Some common recovery terminology
You might need to understand these terms when discussing your situation with your service representative or software support.
| Term | Definition |
|---|---|
| abnormal end (abend) | A system failure or operator action that causes the system to end without being able to end all jobs and close all files. Your system might end abnormally because of a power failure or a problem with certain hardware or software components. |
| auxiliary storage pool | A group of disk units defined from all the disk units that make up auxiliary storage. Auxiliary storage pools (ASPs), also known as disk pools in IBM® i Navigator, allow you to isolate objects on one or more specific disk units. This can reduce the loss of data due to a disk media failure. In most cases, only data stored on disk units in the affected ASP is lost. |
| ASP group | An auxiliary storage pool (ASP) group is made up of a primary ASP and zero or more secondary ASPs. Each ASP is independent in regard to data storage, but in the ASP group they combine to act as one entity. If one ASP is made available or unavailable, the rest of the ASPs in the group are also made available or unavailable at the same time. In a clustered environment, all of the ASPs in a group switch to another node at the same time. The primary and secondary ASPs also share the same database. |
| basic ASP | A user ASP created by grouping together a physical set of disk units and assigning them a number between 2 and 32. A basic ASP is always available for data storage and access. |
| dedicated service tools (DST) | A set of tools to work with the system when the operating system is not available or not working. |
| disk configuration | An internal system table that tells how the physical disk units are arranged on your system. The disk configuration is used to assign units to an ASP. The disk configuration is stored on the load source unit. |
| disk pump | A commonly used term for the procedure used by a service representative to attempt to copy data from a disk unit that has failed. |
| encrypting tape drive | A tape drive, such as the IBM System Storage® TS1120 or IBM Ultrium 4 tape drive, that provides data encryption and key management for backup data. An encrypting tape drive uses the IBM Encryption Key Manager (EKM) to manage the encryption keys. |
| encrypted ASP | An independent ASP or user ASP that is encrypted using cryptographic services. |
| independent ASP | A user ASP that can be made available (varied on) and made unavailable (varied off) without restarting the system. An independent ASP can be either switchable among multiple systems in a high availability environment or privately connected to a single system. |
| library user ASP | A user ASP that contains libraries, directories, and folders and all the objects associated with them. |
| Licensed Internal Code | The layer of IBM i architecture just above the hardware. You must have the Licensed Internal Code on your system before you can restore the operating system. |
| load source unit | The first unit (unit 1) in the system ASP. It contains the Licensed Internal Code and the disk configuration for your system. |
| nonlibrary user ASP | A user ASP that might contain journals, journal receivers, and save files. The libraries associated with these objects are in the system ASP. A nonlibrary user ASP is sometimes called an old-style ASP, because it was the only type of user ASP available before Version 1 Release 3 of the OS/400® licensed program. |
| primary ASP | An independent auxiliary storage pool (ASP) that defines a collection of directories and libraries and might have other secondary ASPs associated with it. A primary ASP defines a database for itself and other ASPs that can be added in its ASP group. |
| secondary ASP | An independent ASP that defines a collection of directories and libraries and must be associated with a primary ASP in an ASP group. A possible use for a secondary ASP is to store journal receivers for objects being journaled in the primary ASP. |
| software encryption | An encryption method that uses backup software encryption to encrypt data to a tape device. For example, BRMS uses cryptographic services keystore files to perform the encrypted backup. |
| system ASP | An ASP that is created by the system and always configured. The system ASP (ASP 1) contains the Licensed Internal Code, licensed programs, and system libraries. The system ASP might also contain user libraries, folders, and directories. The system ASP contains all configured disk units that are not assigned to a user ASP. |
| system service tools (SST) | A subset of the DST tools. The tools available through SST, such as displaying the disk configuration, can be used while the operating system is running and other users are on the system. |
| user ASP | A basic or independent ASP created by grouping together a physical set of disk units. You can assign a basic ASP a number between 2 and 32. When you create an independent ASP, you specify a name; the system then assigns the independent ASP a number between 33 and 255. ASP 1 is always reserved as the system ASP. |
| UDFS ASP | An independent ASP that contains only user-defined file systems (UDFS). It cannot be a member of an ASP group unless it is converted to a primary or secondary ASP. |