Glossary

Numbers

2:1 compression

The relationship between the quantity of data that can be stored with compression as compared to the quantity of data that can be stored without compression. In 2:1 compression, twice as much data can be stored with compression as can be stored without compression.

2.5:1 compression

The relationship between the quantity of data that can be stored with compression as compared to the quantity of data that can be stored without compression. In 2.5:1 compression, two-and-a-half times as much data can be stored with compression as can be stored without compression.

3U

This library requires 3 units (3U) of rack space.

A

A

Ampere.

AC

Alternating current.

Access method

A technique for moving data between main storage and input or output devices.

Accessor

This component contains the library robot and bar code reader. The accessor moves cartridges to and from the I/O Station, storage slots, and tape drives.

Adapter card

A circuit board that adds function to a computer.

Adj

Adjustment.

Administrator (Admin)

The Admin role has access to all menus. The default password is adm001, and the default PIN is 0000.

AH

Authentication Header. An Internet Protocol intended to guarantee connectionless integrity and data origin authentication of IP datagrams. Further, it can optionally protect against replay attacks by using the sliding window technique and discarding old packets.

AIX®

Advanced Interactive Executive. IBM®'s implementation of the UNIX operating system. The System p system, among others, uses AIX as its operating system.

Alphanumeric

Pertaining to a character set that contains letters, numerals, and other characters, such as punctuation marks.

Alter

To change.

Ambient temperature

The temperature of air or other media in a designated area, particularly the area that is surrounding equipment.

AME

Application Managed Encryption.

ampere (A)

A unit of measure for electric current that is equivalent to a flow of 1 coulomb per second, or to the current produced by 1 volt applied across a resistance of 1 ohm.

ANSI

American National Standards Institute.

API

Application planning interface. A set of clearly defined methods of communication between various software components.

Application-managed encryption

Tape encryption that is controlled by an application.

Archive

To collect and store files in a designated place.

ASCII

American National Standard Code for Information Interchange. A 7 bit coded character set (8 bits including parity check) that consists of control characters and graphic characters.

Assigning a device

The establishing of the relationship of a device to a running task, process, job, or program.

Assignment

The naming of a specific device to complete a function.

Asynchronous

Pertaining to two or more processes that do not depend upon the occurrence of specific events such as common timing signals.

Attention (notice)

A word for calling attention to the possibility of danger to a program, device, or system, or to data. Contrast with caution and danger.

ATTN

Attention.

Authentication Header (AH)

A member of the IPSec protocol suite. AH guarantees connectionless integrity and data origin authentication of IP packets.

B

Backup

To make extra copies of documents or software for safekeeping.

Bar code

A code that represents characters by sets of parallel bars of varying thickness and separation, which are read optically by transverse scanning.

Bar code label

Paper bearing a bar code and having an adhesive backing. The bar code label must be affixed to a tape cartridge to enable the library to identify the cartridge and its volume serial number.

Bar code reader

A laser device that is specialized for scanning and reading bar codes and converting them into either the ASCII or EBCDIC digital character code.

Bezel

Decorative and safety cover.

Bicolored

Having two colors.

bit

Either of the digits 0 or 1 when used in the binary numbering system.

BOM or bill of materials

A list of specific types and amounts of direct materials that are expected to be used to produce a specific job or quantity of output.

Border Gateway Protocol (BGP)

BGP is the core routing protocol of the Internet. It works by maintaining a table of IP networks or 'prefixes' that designate network reachability among autonomous systems (AS).

BRMS

Backup Recovery and Media Services.

Browser

A client program that initiates requests to a web server and displays the information that the server returns.

Buffer

A routine or storage that is used to compensate for a difference in rate of flow of data or time of occurrence of events, when data is transferred from one device to another.

Bus

A facility for transferring data between several devices that are located between two end points, only one device able to transmit at a specified moment.

byte

A string that consists of some bits (usually 8) that are treated as a unit and represent a character. A fundamental data unit.

C

CA

Certificate Authority.

CA certification

In cryptography, a certificate from a certificate authority (CA).

Capacity

The amount of data that can be contained on storage media and expressed in bytes of data.

Cartridge manual rewind tool

A device that can be fitted into the reel of a cartridge and used to rewind tape into or out of the cartridge.

Cartridge memory (CM)

Within each data cartridge, an embedded electronics and interface module that can store and retrieve a cartridge's historical usage and other information.

Cartridge storage slot

Individual slot that is located within a magazine that is used to house tape cartridges.

Caution (notice)

A word to call attention to possible personal harm to people. Contrast with attention and danger.

CD

Compact Disc. A disc, usually 4.75 inches in diameter, from which data is read optically by using a laser.

CE

Customer engineer, field engineer, service representative.

Centimeter (cm)

One one-hundredth of a meter (0.01 m). Approximately 0.39 inches.

Channel command

An instruction that directs a data channel, control unit, or device to run an operation or set of operations.

Char

Character.

CHK

Check.

Cleaning cartridge

A tape cartridge that is used to clean the heads of a tape drive. Contrast with data cartridge.

CM

Cartridge Memory. Within each data cartridge, an embedded electronics and interface module that can store and retrieve a cartridge's historical usage and other information.

CoD

Capacity on-demand.

Command

A control signal that initiates an action or the start of a sequence of actions.

Compact disc (CD)

A disk, usually 4.75 inches in diameter, from which data is read optically by using a laser.

Compression

The process of eliminating gaps, empty fields, redundancies, and unnecessary data to shorten the length of records or blocks.

Concurrent

Refers to diagnostic procedures that can be run on one control unit while the rest of the subsystem remains available for customer applications.

Contingent connection

A connection between a channel path and a drive that is caused when a unit check occurs during an I/O operation.

Controller

A device that provides the interface between a system and one or more tape drives.

Control path drive

ControllerA device that provides the interface between a system and one or more tape drives.Control path drive A drive that communicates messages from the host computer to the library in which the drive is installed.

Cookie

A packet of data that is exchanged between the library and a web browser to track configuration.

CP

Circuit protector.

CPF

Control Path Failover.

CRU

Customer Replaceable Unit.

CSA

Canadian Standards Association.

Ctrl

Control.

CU

Control unit.

D

Danger (notice)

A word to call attention to possible lethal harm to people. Contrast with attention and caution.

Data

Any representations such as characters or analog quantities to which meaning is or might be assigned.

Data buffer

The storage buffer in the control unit. This buffer is used to increase the data transfer rate between the control unit and the channel.

Data cartridge

A tape cartridge that is dedicated to storing data. Contrast with cleaning cartridge.

Data check

A synchronous or asynchronous indication of a condition that is caused by invalid data or incorrect positioning of data.

DC

Direct current.

DCS

Designated Cleaning Slot.

Degauss

Makes a magnetic tape nonmagnetic by using electrical coils that carry currents that neutralize the magnetism of the tape.

Degausser

A device that makes magnetic tape nonmagnetic.

Degradation

A decrease in quality of output or throughput or an increase in machine error rate.

Degraded

Decreased in quality of output or throughput or increased machine error rate.

Deserialize

To change from serial-by-bit to parallel-by-byte.

Detented

A part that is held in position with a catch or lever.

Device

Any hardware component or peripheral device, such as a tape drive or tape library, that can receive and send data.

Device driver

A file that contains the code that is needed to use an attached device.

DHCPv6

The Dynamic Host Configuration Protocol for IPv6. Although IPv6's stateless address autoconfiguration removes the primary motivation for DHCP in IPv4, DHCPv6 can still be used to statefully assign addresses if the network administrator wants more control over addressing.

DH group

Diffie-Hellman group.

DIAG

Diagnostic section of maintenance information manual.

Differential

See High Voltage Differential (HVD).

Direct-access storage

A storage device in which the access time is independent of the location of the data.

Display contrast

The brightness of the display on the Operator Panel.

DLL

Dynamic Link Library. The Microsoft implementation of the shared library concept. These libraries usually have the file extension dll, ocs (for libraries that contain activeX controls, or drv (for legacy system drivers).

DNS

Directory Name System. This system allows the library to recognize text-based addresses instead of numeric IP addresses.

Download

To transfer programs or data from a computer to a connected device, typically a personal computer.

To transfer data from a computer to a connected device, such as a workstation or personal computer.

DPF

Data Path Failover.

DRAM

Dynamic random-access memory.

Drive, magnetic tape

A mechanism for moving magnetic tape and controlling its movement.

Drive Not Configured

This message occurs during the first boot after a factory settings restore is run. This message is not a real issue since it takes time for the library to configure.

DRV

Drive.

DSA key

Encryption key type.

DSE

Data security erase.

DSP

Digital signal processor.

E

EBCDIC

Extended binary-coded decimal interchange code.

EC

Edge connector. Engineering change.

ECC

Error correction code.

EEB

Ethernet Expansion Blade.

EEPROM

Electrically erasable programmable read-only memory.

EIA

Electronics Industries Association.

EIA unit

A unit of measure, which is established by the Electronic Industries Association, equal to 44.45 millimeters (1.75 inches).

Eject

To remove or force out from within.

EKM

Encryption Key Manager.

Electronic mail

Correspondence in the form of messages that are transmitted between user terminals over a computer network.

Email

See electronic mail.

Encryption

A method of storing data in a format that helps protect data from inadvertent or deliberate compromise. An encryption-enabled drive contains the necessary hardware and firmware to encrypt and decrypt host tape application data. Encryption policy and encryption keys are provided by the host application or host server.

Encryption key manager (EKM)

A software program that assists IBM-encrypting tape drives in generating, protecting, storing, and maintaining encryption keys that encrypt information that is written to and decrypt information that is read from tape media.

Entitlement

IBM Entitlement is the official right to receive service and support for your tape library.

EPO

Emergency power off.

EPROM

Erasable programmable read only memory.

EQC

Equipment check.

Equipment check

An asynchronous indication of a malfunction.

Error log

A data set or file in a product or system where error information is stored for later access.

ESD

Electrostatic discharge.

ESP

Encapsulating Security Payload. An Internet Protocol that provides origin authenticity, integrity, and confidentiality protection of a packet. ESP also supports encryption-only and authentication-only configurations, but encryption without authentication is discouraged because it is insecure.

F

FAT32

FAT stands for File Allocation Table. FAT32 is an extension which means that data is stored in chunks of 32 bits. Any USB flash drive that is used for updating firmware or exporting logs for the TS4300 library must be in this format.

Fault symptom code (FSC)

A hexadecimal code that is generated by the drive or the control unit microcode in response to a detected subsystem error.

FC

Fibre Channel, Feature code.

FCC

Federal communications commission.

FE

Field engineer, customer engineer, or service representative.

FH

Full Height.

Fibre Channel

A high-speed method to connect data storage to a server. The British spelling of "Fibre" is used because the technology can be used with either fiber optic or copper cables. Thus, the name does not imply that it can be used only with a fiber optic cable.

Fiducial

A target that is used for teaching a physical location to a robot.

Field replaceable unit (FRU)

An assembly that is replaced in its entirety when any one of its components fails.

File

A named set of records that are stored or processed as a unit. Also referred to as a data set.

File protection

The processes and procedures that are established in an information system that are designed to inhibit unauthorized access to, contamination of, or deletion of a file.

File transfer protocol (FTP)

In the Internet suite of protocols, an application layer protocol that uses TCP and Telnet services to transfer bulk-data files between machines or hosts.

Firmware

Proprietary code that is delivered as microcode as part of an operating system. Firmware is more efficient than software loaded from an alterable medium and more adaptable to change than pure hardware circuitry. An example of firmware is the Basic input/output system (BIOS) in read-only memory (ROM) on a PC system board.

FLASH EEPROM

An electrically erasable programmable read-only memory (EEPROM) that can be updated.

FMR

Field microcode replacement.

Format

The arrangement or layout of data on a data medium.

Formatter

Part of a magnetic tape subsystem that runs data conversion, speed matching, encoding, first-level error recovery, and interfaces to one or more tape drives.

FP

File protect.

Frayed

Damaged as if by an abrasive substance.

FRU

Field replaceable unit.

FSC

Fault symptom code.

FSI

Fault symptom index.

FTSS

Field Technical Sales Support.

Functional microcode

Microcode that is resident in the machine during normal customer operation.

G

g

Gram.

GB

gigabyte.

GBIC

Gigabit Interface Converter.

Gb/s

gigabits/second

Gbit

gigabit

gigabit (Gbit)

1 000 000 000 bits.

gigabyte (GB)

1 000 000 000 bytes.

Gigabit Interface Converter (GBIC)

Converts copper interface to optic interface.

Gnd

Ground.

GUI

Graphical User Interface

H

HBA

Host Bus Adapter.

HD Slot Technology

High-density (HD) slot technology. Allows multiple cartridges to be stored in a tiered architecture.

hertz (Hz)

Unit of frequency. 1 hertz equals one cycle per second.

hex

Hexadecimal.

HH

Half Height.

High Voltage Differential (HVD)

A logic-signaling system that enables data communication between a supported host and the library. HVD signaling uses a paired plus and minus signal level to reduce the effects of noise on the SCSI bus. Any noise that is injected into the signal is present in both a plus and minus state, and is canceled. Synonymous with differential.

HVD

SCSI Bus High-Voltage Differential.

Hz

Hertz (cycles per second).

I

IBM Security Key Lifecycle Manager (SKLM)

IBM's EKM application that assists encrypting tape drives in generating, protecting, storing, and maintaining encryption keys that encrypt information that is written to and decrypt information that is read from tape media.

IBM Spectrum Archive

Formerly known as Linear Tape File System (LTFS). A file system that works with LTO Generation tape technology to access data stored on an IBM tape cartridge.

IBM Ultrium Tape Drive

Located within the library, a data-storage device that controls the movement of the magnetic tape in an IBM LTO Ultrium Tape Cartridge. The drive houses the mechanism (drive head) that reads and writes data to the tape.

ID

Identifier.

Identifier (ID)

(1) In programming languages, a lexical unit that names a language object. For example, the names of variables, arrays, records, labels, or procedures. An identifier usually consists of a letter optionally followed by letters, digits, or other characters. (2) One or more characters that are used to identify or name data element and possibly to indicate certain properties of that data element. (3) A sequence of bits or characters that identifies a program, device, or system to another program, device, or system.

IEC

International Electrotechnical Commission.

IKE

Internet Key Exchange that is used in the IPSec protocol.

IML

Initial microprogram load.

Incompatible magazine

This message might display on the Operator Panel during library initialization. It occurs during factory restore or VPD. This message is not a real issue since it takes time for the library to configure.

Initial microprogram load (IML)

The action of loading a microprogram from external storage to writable control storage.

Initiator

The component that runs a command. The initiator can be the host system or the tape control unit.

INST

Installation.

Interface

A shared boundary. An interface might be a hardware component to link two devices or it might be a portion of storage or registers accessed by two or more computer programs.

Internet Key Exchange (IKE)

The protocol that is used to set up a security association (SA) in the IPSec protocol suite. See also Security Association (SA).

Internet Protocol Version 4 (IPv4)

See IPv4.

Internet Protocol Version 6 (IPv6)

See IPv6.

Interposer

The part that is used to convert a 68-pin connector to a 50-pin D-shell connector.

Intervention required

Manual action is needed.

INTRO

Introduction.

I/O

Input/output.

I/O Station

Cartridge location that is dedicated for the insertion of cartridges into and the removal of cartridges from the library.

IOP

Input/output processor.

IP

Internet Protocol.

IP address

An identifier for a computer or device on an Internet Protocol (TCP/IP) network. Networks that use the TCP/IP protocol route messages that are based on the IP address of the destination. See IPv4 and IPv6.

IPL

Initial program load.

IPSec (IP Security)

A set of protocols for securing IPv6 network communications by authentication and encryption.

IP Stack

A TCP/IP protocol stack that manages static IP addresses.

IPv4

A network layer protocol for packet-switched networks. IPv4 supports 2³² (about 4.3 billion) addresses.

IPv6

A network layer protocol for packet-switched networks. It is the designated successor of IPv4 for general use on the Internet. The main improvement of IPv6 is the increase in the number of addresses available for networked devices, allowing, for example, each mobile phone and mobile electronic device to have its own unique address.

ISV

Independent software vendor.

ITDT

IBM Tape Diagnostic tool.

ITST

Idle-time self-test.

K

Kerberos

Kerberos Authentication is a standard (RFC 1510) third-party authentication protocol that provides end-to-end security for distributed computing environments.

Key Path Diagnostics (KPD)

Key Path Diagnostics is a test tool that provides details to troubleshoot Encryption communication issues.

kilogram (kg)

1000 grams (approximately 2.2 pounds).

km

kilometer. 1000 Meters, Approximately 5/8 mile.

KMIP

Key Management Interoperability Protocol.

L

LAN

Local area network. A computer network within a limited area.

LCB

Library Control Blade.

LCD

See liquid crystal display.

LDAP

Lightweight Directory Access Protocol. This protocol allows the library to use login and password information that is stored on a server to grant access to the library functions.

LDAPS

Secure LDAP over SSL.

LDI

Library Drive Interface.

LED

Light-emitting diode.

Library certification

In cryptography, a certificate that is provided by the library.

Library-managed encryption

Tape encryption that is controlled by the tape library.

Linear Tape-Open (LTO)

A type of tape storage technology that is developed by the IBM Corporation, Hewlett-Packard, and Quantum. LTO technology is an "open format" technology, which means that its users have multiple sources of product and media. The "open" nature of LTO technology enables compatibility between different vendors' offerings by ensuring that vendors comply with verification standards. The LTO technology is implemented in two formats: the Accelis format focuses on fast access; the Ultrium format focuses on high capacity. The Ultrium format is the preferred format when capacity (rather than fast access) is the key storage consideration. An Ultrium cartridge has a compressed data capacity of up to 30 TB (2.5:1 compression) and a native data capacity of up to 12 TB.

Liquid crystal display (LCD)

A low-power display technology that is used in computers and other I/O devices.

Loadable

The ability to be loaded.

LME

Library Managed Encryption.

LTO

See Linear Tape-Open.

LTO cartridge memory (LTO-CM)

Within each LTO Ultrium data cartridge, an embedded electronics and interface module that can store and retrieve a cartridge's historical usage and other information.

LUN

Logical Unit Number.

LVD

SCSI Bus Low Voltage Differential.

M

M8

LTO 8 Type M Cartridge.

MAC address

The Media Access Control address of a computer networking device.

Magnetic tape

A tape with a magnetic surface layer on which data can be stored by magnetic recording.

Management GUI

Web User Interface, Web UI, Web GUI.

MAP

Maintenance analysis procedure.

Mask

A pattern of characters that controls the retention or elimination of portions of another pattern of characters. To use a pattern of characters to control the retention or elimination of portions of another pattern of characters.

Master file

A file that is used as an authority in a job and that is relatively permanent, even though its contents might change. Synonymous with main file.

Maximum Transmission Unit (MTU)

The size of the largest packet that a network protocol can transmit.

MB

Megabyte (expressed as data rate in MB/s or MB/second).

Media capacity

The amount of data that can be contained on a storage medium, expressed in bytes of data.

Media-type identifier

Pertaining to the bar code on the bar code label of the IBM Ultrium tape cartridge, a two-character code, L1, that represents information about the cartridge. L identifies the cartridge as one that can be read by devices that incorporate LTO technology; 1 indicates that it is the first generation of its type.

Mega

One million of.

meter

In the Metric System, the basic unit of length equal to approximately 39.37 inches.

MIB

Management Information Base. Information repository that is used by SNMP.

Micro

One millionth of.

Microcode

(1) One or more micro instructions. (2) A code, representing the instructions of an instruction set, which is implemented in a part of storage that is not program-addressable. (3) To design, write, and test one or more micro instructions. (4) See also microprogram.

Microdiagnostic routine

A program that runs under the control of a supervisor, usually to identify field replaceable units.

Microdiagnostic utility

A program that is run by the customer engineer to test the machine.

Microinstruction

A basic or elementary machine instruction.

Microprogram

A group of micro instructions that when run completes a planned function.

The term microprogram represents a dynamic arrangement or selection of one or more groups of micro instructions for execution to complete a particular function. The term microcode represents microinstructions that are used in a product as an alternative to hard-wired circuitry to implement certain functions of a processor or other system component.

MIM

Media information message.

mm

Millimeter.

Modifier

That which changes the meaning.

Monitor

The Monitor role is an interchangeable term corresponding to the User role. The Monitor role has viewing privileges to the unit, but is not able to make configuration changes.

Mount a device

To assign an I/O device with a request to the operator.

MP

Microprocessor.

ms

Millisecond.

MSG

Message.

Multipath

Pertaining to using more than one path.

N

N/A

Not applicable.

Network Address Translation (NAT)

NAT involves rewriting the source or destination addresses of IP packets as they pass through a router or firewall. Most systems that use NAT do so to enable multiple hosts on a private network to access the Internet over a single public IP address.

NEMA

National Electrical Manufacturers Association.

Node

In a network, a point at which one or more functional units connect channels or data circuits.

NTFS

New Technology File System. The primary file system that is used in Windows.

NTP

Network Time Protocol. This protocol allows the library to set its internal date and time that is based on the date and time of a server.

NVS

Nonvolatile storage. A storage device whose contents are not lost when power is cut off.

O

OCP

Operator Panel (Operator Control Panel).

Oersted

The unit of magnetic field strength in the unrationalized centimeter-gram-second (cgs) electromagnetic system. The oersted is the magnetic field strength in the interior of an elongated, uniformly wound solenoid that is excited with a linear current density in its winding of`1 ampere per 4π centimeters of axial length.

Offline

Pertaining to the operation of a functional unit without the continual control of a computer. Contrast with online.

Online

Pertaining to the operation of a functional unit that is under the continual control of a computer. Contrast with offline.

OPER

Operation.

OV

Over voltage.

Overrun

Loss of data because a receiving device is unable to accept data at the rate it is transmitted.

Overtightening

To tighten too much.

P

Parameter

A variable that is given a constant value for a specified application and that might denote the application.

p bit

Parity bit.

PC

Parity check.

PCC

Power® control compartment.

PDF

Portable Document Format.

PE

Parity error. Product engineer.

PFS

Perfect forward secrecy.

Pick

Pertaining to the library to remove, by using a robotic device, a tape cartridge from a storage slot or drive.

Picker

A robotic mechanism that is located inside the library that moves cartridges between the cartridge storage slots and the drive.

PM

Preventive maintenance.

POR

Power-on reset.

Port

A physical connection for communication between the 3590 and the host processor. The 3590 has 2 SCSI ports.

Portable Document Format (PDF)

A standard that is specified by Adobe Systems, Incorporated, for the electronic distribution of documents. PDF files are compact, can be distributed globally (by way of email, the web, intranets, or CD-ROM), and can be viewed with the Acrobat Reader. Acrobat Reader is software from Adobe Systems that can be downloaded at no cost from the Adobe Systems home page.

Private key

A cryptographic key that is used to decrypt a message.

PROM

Programmable read only memory.

PS

Power supply.

PTF

Program temporary fix. A single bugfix or group of bugfixes that are distributed in a form ready to install for customers.

PWR

Power.

R

Rack

A unit that houses the components of a storage subsystem, such as the library.

Rackmount kit

A packaged collection of articles that are used to install the rack-mounted version of the library.

RAM

Random access memory.

Random access memory

A storage device into which data is entered and from which data is retrieved in a nonsequential manner.

Random Mode

In Random mode, the library allows the server's (host's) application software to select any data cartridge in any order.

RAS

Reliability, availability, and serviceability.

Record

A collection of related data or words, which are treated as a unit.

Recording density

The number of bits in a single linear track measured per unit of length of the recording medium.

Recoverable error

An error condition that allows continued execution of a program.

Ref

Reference.

Reg

Register.

Reinventory

To inventory again.

REST

Representational state transfer. Part of an API. REST systems aim for fast performance, reliability, and the ability to grow, by reusing components that can be managed and updated without affecting the system as a whole, even while it is running.

Retension

The process or function of tightening the tape onto the cartridge, if it is sensed that the tape has a loose wrap on the cartridge.

RFC (Request for Comments)

Request for Comments (RFC) documents are a series of memoranda, which encompasses new research, innovations, and methodologies applicable to Internet technologies.

RH

Relative humidity.

RID tag

Repair identification tag.

RML

Rack Mount Line.

Robot

Picker.

Robotic Assembly

The picker, picker assembly.

Robotics

Picker assembly.

Root CA certification

In cryptography, a root certificate from a certificate authority (CA).

RPQ

Request for price quotation.

RSA key

Encryption key type.

R/W

read/write.

S

s

Seconds of time.

SAC

Service Action Code. Code that is developed to indicate possible FRU or FRUs to replace to repair the hardware.

SAN

Storage area network.

SAS

Serial Attached SCSI. A computer bus technology and serial communication protocol for direct attached storage devices. SAS is a replacement for parallel SCSI with higher speeds, but still uses SCSI commands.

Scratch cartridge

A data cartridge that contains no useful data, but can be written to with new data.

SCD

Single Character Display.

SCSI

Small computer system interface.

SE

Single-ended.

Sequential Mode

Sequential Mode is intended to be used by host applications that aren’t supporting SCSI media changer devices but need to get another cartridge loaded if the current cartridge is full.

Segment

A part.

Sel

Select.

Serial Attached SCSI (SAS)

A drive with a SAS interface can be linked directly to controllers. SAS is a performance improvement over traditional SCSI because SAS enables multiple devices (up to 128) of different sizes and types to be connected simultaneously with thinner and longer cables. It supports full-duplex signal transmission up to 3 Gb/s. In addition, SAS drives can be hot-plugged.

Serialize

To change from parallel-by-byte to serial-by-bit.

Serializer

A device that converts a space distribution of simultaneous states, which represents data into a corresponding time sequence of states.

Service

Access to this level is for Service personnel only - Service personnel have access to all menus.

Servo, servos

An adjective for use in qualifying some part or aspect of a servomechanism.

Servomechanism

A feedback control system in which at least one of the system signals represents mechanical motion.

Signature

A digital signature that is used in cryptography to identify one party to ensure authenticity.

SKLM (IBM Security Key Lifecycle Manager)

IBM EKM application that assists encrypting tape drives in generating, protecting, storing, and maintaining encryption keys that encrypt information that is written to and decrypt information that is read from tape media.

SKLM for z/OS®

Security Key Lifecycle Manager for IBM System z® mainframes.

Slot blocker

A slot blocker is used to restrict/close off a data cell so a data cartridge cannot be inserted.

Small Computer Systems Interface (SCSI)

A standard that is used by computer manufacturers for attaching peripheral devices (such as tape drives, hard disks, CD-ROM players, printers, and scanners) to computers (servers). Pronounced "scuzzy". Variations of the SCSI interface provide for faster data transmission rates than standard serial and parallel ports (up to 320 megabytes per second). The variations include

• Fast/Wide SCSI - Uses a 16-bit bus, and supports data rates of up to 20 MBps.
• SCSI-1 - Uses an 8-bit bus, and supports data rates of 4 MBps.
• SCSI-2 - Same as SCSI-1, but uses a 50-pin connector instead of a 25-pin connector, and supports multiple devices.
• Ultra-SCSI - Uses an 8- or 16-bit bus, and supports data rates of 20 or 40 MBps.
• Ultra2 SCSI - Uses an 8- or 16-bit bus and supports data rates of 40 or 80 MBps.
• Ultra3 SCSI - Uses a 16-bit bus and supports data rates of 80 or 160 MBps.
• Ultra160 SCSI - Uses a 16-bit bus and supports data rates of 80 or 160 MBps.
• Ultra320 SCSI - Uses a 16-bit bus and supports data rates of 320 MBps.

SMI-S

See Storage Management Initiative Specification (SMI-S).

SMTP

Simple Mail Transfer Protocol. SMTP is a standard for email transmissions across the internet.

SNMP

Simple Network Management Protocol. SNMP is used by network management systems to monitor network-attached devices for conditions that warrant administrative attention.

SNTP

Simple Network Time Protocol. Used to synchronize the clocks of network-attached devices.

SMW

Servo Manufacturer's Word.

SNS

Sense.

Special feature

A feature that can be ordered to enhance the capability, storage capacity, or performance of a product, but is not essential for its basic work.

SPI

Security Parameters Index.

SR

Service representative, see also CE.

SRAM

Static random access memory.

SS

Status store.

SSH

Secure Shell.

SSL (Secure Sockets Layer)

A set of cryptographic protocols for secure communications on the Internet for such things as web browsing, email, Internet faxing, instant messaging, and other data transfer. SSL allows applications to communicate across a network in a way that is designed to prevent eavesdropping, tampering, and message forgery.

SSP

Serial SCSI Protocol.

ST

Store.

Standard feature

The significant design elements of a product that are included as part of the fundamental product.

START

Start maintenance.

StartTLS

Secure LDAP communication that uses TLS.

Storage Management Initiative Specification (SMI-S)

A storage standard that is developed and maintained by the Storage Networking Industry Association (SNIA). It is also ratified as an ISO standard. The main objective of SMI-S is to enable broad interoperable management of heterogeneous storage vendor systems.

Subsystem

A secondary or subordinate system, capable of operating independently of, or asynchronously with, a controlling system.

Superuser

The Superuser role has access to most sections of the library menus.

SUPP

Support.

Sync

Synchronous, synchronize. Occurring with a regular or predictable time relationship.

T

Tachometer, tach

A device that emits pulses that are used to measure/check speed or distance.

Tape cartridge

A container that holds magnetic tape that can be processed without separating it from the container.

Tape void

An area in the tape in which no signal can be detected.

TB

Terabyte.

TCP/IP

Transmission Control Protocol/Internet Protocol.

TCU

Tape control unit.

Terabyte

One terabyte = 1,000,000,000,000 bytes, or 1000 gigabytes (GBs).

TH

Thermal.

TKLM (IBM Tivoli® Key Lifecycle Manager)

IBM's EKM application that assists encrypting tape drives in generating, protecting, storing, and maintaining encryption keys that encrypt information that is written to and decrypt information that is read from tape media.

thread/load operation

A procedure that places tape along the tape path.

TLS

Transport :Layer Security.

TM

Tapemark, Trademark.

Transport mode

End-to-end communications security in which the end-point computers do the security processing.

Trusted certification

In cryptography, a trustworthy certificate that is not registered with a certificate authority.

Tunnel mode

Port-to-port communications security in which security is provided to several machines by a single node.

U

UART

Universal asynchronous receiver/transmitter.

UID

Unit Identification.

UL

Underwriter's Laboratories.

Universal rack connector

A rackmount kit has four universal rack connectors as part of the kit. Each connector has two sides - one side is for round-hole racks, and the other side is for square-hole racks. The square-hole side might be painted. The connectors are installed from the inside of the rack out, and the rails are hooked onto them. See Figure 1.

Unload

Prepare the tape cartridge for removal from the drive.

User

The User role is an interchangeable term corresponding to the Monitor role. The User role has viewing privileges to the unit, but is not able to make configuration changes.

Utilities

Utility programs.

Utility programs

A computer program in general support of the processes of a computer. For instance, a diagnostic program.

UV

Under voltage.

V

VOLSER

Volume serial number.

Volume

A certain portion of data, together with its data carrier, that can be handled conveniently as a unit.

VPD

Vital product data. The information that is contained within the tape drive that requires nonvolatile storage that is used by functional areas of the drive, and information that is required for manufacturing, RAS, and engineering.

W

Web UI, Web GUI, Web User Interface

Management GUI

Word

A character string that is convenient for some purpose to consider as an entity.

Worldwide Node Name (WWNN)

A unique character string that identifies Fibre Channel Host Bus adapters (HBA).

WORM

Write Once, Read Many.

Write

Write command.

WT

World trade.

WWCID

Worldwide Cartridge Identifier.

WWN

Worldwide Name.

WWNN

Worldwide Node Name.

WWPN

Worldwide port name.

X

XR

External register.

XRA

External register address register.