Use the ECARTRIDGE device class when you are using StorageTek drives such as the StorageTek SD-3, 9490, 9840 or 9940.
If you are defining a device class
for devices that are to be accessed through a z/OS® media
server,
see UPDATE DEVCLASS (Update an ECARTRIDGE device class for z/OS media server).
Privilege class
To issue this command, you must have system privilege or unrestricted storage privilege.
Syntax
>>-UPDate DEVclass--device_class_name---------------------------> >--+--------------------------+---------------------------------> '-LIBRary--=--library_name-' >--+-----------------------------+------------------------------> '-LBProtect--=--+-READWrite-+-' +-WRITEOnly-+ '-No--------' >--+--------------------------+--+----------------------+-------> '-FORMAT--=--+-DRIVE-----+-' '-ESTCAPacity--=--size-' +-18T-------+ +-18TC------+ +-36T-------+ +-36TC------+ +-SD3A------+ +-SD3AC-----+ +-SD3B------+ +-SD3BC-----+ +-SD3C------+ +-SD3CC-----+ +-9840------+ +-9840-C----+ +-9940------+ +-9940-C----+ +-9940B-----+ +-994B-C----+ +-M8100-----+ +-M8100C----+ +-T9840C----+ +-T9840C-C--+ +-T9840D----+ +-T9840D-C--+ +-T10000A---+ +-T10000A-C-+ +-T10000B---+ +-T10000B-C-+ +-T10000C---+ '-T10000C-C-' >--+-----------------------------------+------------------------> '-PREFIX--=--+-ADSM---------------+-' '-tape_volume_prefix-' >--+----------------------------+--+-----------------------+----> '-MOUNTRetention--=--minutes-' '-MOUNTWait--=--minutes-' >--+---------------------------+--------------------------------> '-MOUNTLimit--=--+-DRIVES-+-' +-number-+ '-0------' >--+----------------------------------------------+------------>< | (1) (2) | '-------------DRIVEEncryption--=--+-ON-------+-' +-ALLOW----+ +-EXTERNAL-+ '-OFF------'
Notes:
- You can use drive encryption only for Oracle StorageTek T10000B drives with a format value of DRIVE, T10000B, or T10000B-C, and for Oracle StorageTek T10000C drives with a format value of DRIVE, T10000C or T10000C-C.
- You cannot specify both WORM=YES and DRIVEENCRYPTION=ON.
Parameters
- device_class_name (Required)
- Specifies the name of the device class to be updated.
- LIBRary
- Specifies the name of the defined library object with the ECARTRIDGE tape drives that can be used by this device class. For information about defining a library object, see the DEFINE LIBRARY command.
- LBProtect
Specifies whether logical block protection is used to ensure the integrity of data stored on tape. When LBPROTECT is set to READWRITE or to WRITEONLY, the server uses this feature of the tape drive for logical block protection and generates cyclic redundancy check (CRC) protection information for each data block written on tape. The server also validates the CRC protection information when data is read from the tape.
The following values are possible:- READWrite
- Specifies that logical block protection is enabled in the server
and the tape drive for both read and write operations. Data is stored
with CRC information in each block. This mode affects performance
because additional processor usage is required for Tivoli® Storage
Manager and the
tape drive to calculate and compare CRC values. The READWRITE value
does not affect backup sets and data that is generated by the BACKUP
DB command.
When the LBPROTECT parameter is set to READWRITE, you do not have to specify the CRCDATA parameter in a storage pool definition because logical block protection provides better protection against data corruption.
- WRITEOnly
- Specifies that logical block protection is enabled in the server and the tape drive for write operations only. Data is stored containing CRC information in each block. For read operations, the server and the tape drive do not validate the CRC. This mode affects performance because additional processor usage is required for Tivoli Storage Manager to generate the CRC and for the tape drive to calculate and compare CRC values for write operations. The WRITEONLY value does not affect backup sets and data that are generated by the BACKUP DB command.
- No
- Specifies that logical block protection is not enabled in the server and the tape drive for read and write operations. However, the server enables logical block protection on write operations for a filling volume that already has data with logical block protection.
Restriction: Logical block protection is supported only on Oracle StorageTek T10000C drives.- FORMAT
- Specifies the recording format to be used when data is written
to sequential access media. This parameter is optional. Attention: If you specify DRIVE for a device class that has non-compatible sequential access devices, then you must mount volumes on devices that are capable of reading or writing the format that is established when the volume was first mounted. This can cause delays if the only sequential access device that can access the volume is already in use.The following table lists the recording formats and estimated capacities for ECARTRIDGE devices:
Table 1. Recording formats and default estimated capacities for ECARTRIDGE tapes Format Estimated Capacity Description DRIVE – The server selects the highest format that is supported by the drive on which a volume is mounted. Attention: Avoid specifying DRIVE when a mixture of drives is used within the same library. For example, do not use this option for a library that contains some drives that support recording formats superior to other drives.18T 360 MB 18-track uncompressed (standard) (read-only) format. 18TC 1.44 GB 18-track extended (read-only), compressed format. 36T 720 MB 36-track extended (read and write) format. 36TC 2.88 GB 36-track extended (read and write), compressed format. SD3A 10 GB Uncompressed (standard) format, using a 10 GB 'A' cartridge with 91 meters (298 feet) of tape. SD3AC 40 GB Compressed format, using a 10 GB 'A' cartridge with 91 meters (298 feet) of tape. SD3B 25 GB Uncompressed (standard) format, using a 25 GB 'B' cartridge with 204 meters (668 feet) of tape. SD3BC 100 GB Compressed format, using a 25 GB 'B' cartridge with 204 meters (668 feet) of tape. SD3C 50 GB Uncompressed (standard) format, using a 50 GB 'C' cartridge with 392 meters (1286 feet) of tape. SD3CC 200 GB Compressed format, using a 50 GB 'C' cartridge with 392 meters (1286 feet) of tape. 9840 20 GB Uncompressed 9840 format, using a StorageTek 9840 cartridge 9840-C 80 GB LZ-1 Enhanced (4:1) compressed 9840 format, using a StorageTek 9840 cartridge 9940 60 GB Uncompressed 9940 format, using a StorageTek 9940 cartridge 9940-C 120 GB Compressed 9940 format, using a StorageTek 9940 cartridge 9940B 200 GB Uncompressed 9940B format, using a StorageTek 9940 cartridge 9940B-C 400 GB Compressed 9940B format, using a StorageTek 9940 cartridge M8100 10 GB Uncompressed (standard) format, using a 10 GB cartridge. M8100C 10 GB Compressed format, using a 10 GB cartridge. Because there is no mechanism to determine the type of cartridge in an M8100 drive, the server assumes a 10 GB estimated uncompressed capacity. T9840C 40 GB Uncompressed T9840C format, using a StorageTek 9840 cartridge T9840C-C 80 GB Compressed T9840C format, using a StorageTek 9840 cartridge T9840D 75 GB Uncompressed T9840D format, using a StorageTek 9840 cartridge T9840D-C 150 GB Compressed T9840D format, using a StorageTek 9840 cartridge T10000A 500 GB Uncompressed T10000A format, using a StorageTek T10000 cartridge T10000A-C 1 TB Compressed T10000A format, using a StorageTek T10000 cartridge T10000B 1 TB Uncompressed T10000B format, using an Oracle StorageTek T10000 cartridge T10000B-C 2 TB Compressed T10000B format, using an Oracle StorageTek T10000 cartridge T10000C 5 TB Uncompressed T10000C format, using an Oracle StorageTek T10000 T2 cartridge T10000C-C 10 TB Compressed T10000C format, using an Oracle StorageTek T10000 T2 cartridge Notes:- Some formats use a tape drive hardware compression feature. Depending on the effectiveness of compression, the actual capacity might be double or more than the listed value.
- T10000A drives can read and write the T10000A format only. T10000B drives can read, but cannot write, the T10000A format. T10000C drives can read, but cannot write, the T10000A and T10000B formats.
- ESTCAPacity
- Specifies the estimated capacity for the sequential access volumes
that are categorized by this device class. This parameter is optional.
You can specify this parameter if the default estimated capacity for the device class is inaccurate due to compression of data.
You must specify this value as an integer followed by K (kilobytes), M (megabytes), G (gigabytes), or T (terabytes). For example, ESTCAPACITY=5M specifies that the estimated capacity for a volume in this device class is 5 MB.
The smallest value that is allowed is 1 MB (that is, ESTCAPACITY=1M). To force the IBM® Tivoli Storage Manager server to determine the estimated capacity for the volumes that are assigned to this device class, specify ESTCAPACITY="".
For more information about the default estimated capacity for cartridge tapes, see Table 1.
- PREFIX
- Specifies the high-level qualifier of the data set name that the
server writes into the sequential access media labels. For each sequential
access volume assigned to this device class, the server uses this
prefix to create the data set name. This parameter is optional.
If you previously established a tape label naming convention that supports your current tape management system, consider the use of a tape volume prefix that conforms to your naming conventions.
- MOUNTRetention
- Specifies the number of minutes to retain an idle sequential access
volume before dismounting it. This parameter is optional. You can
specify a number from 0 to 9999.
This parameter can improve response time for sequential access media mounts by leaving previously mounted volumes online. However, for EXTERNAL library types (that is, a library that is managed by an external media management system), set this parameter to a low value (for example, two minutes) to enhance device sharing between applications.
- MOUNTWait
- Specifies the maximum number of minutes the server waits for an operator to respond to a request to either mount a volume in a drive in a manual library or check in a volume to be mounted in an automated library. This parameter is optional. If the mount request is not satisfied within the specified amount of time, the mount request is canceled. You can specify a number from 0 to 9999.
- MOUNTLimit
- Specifies the maximum number of sequential access volumes that
can be simultaneously mounted for the device class. This parameter
is optional. You can specify a number from 0 to 4096.
If you plan to use the simultaneous-write function, ensure that sufficient drives are available for the write operation. If the number of drives needed for a simultaneous-write operation is greater than the value of the MOUNTLIMIT parameter for a device class, the transaction fails.
The following are possible values:- DRIVES
- Specifies that every time a mount point is allocated, the number
of drives that are defined to the library is used to calculate the
true MOUNTLIMIT value (including online status). Note: For EXTERNAL library types, do not specify DRIVES for the MOUNTLIMIT value. Specify the number of drives for the library as the MOUNTLIMIT value.
- number
- Specifies the maximum number of drives that are used concurrently in this device class by the server. This value must never exceed the number of drives that are defined and online in the library that services this device class.
- 0 (zero)
- Specifies that no new transactions can gain access to the storage pool. Any current transactions continue and complete but new transactions are terminated.
- DRIVEEncryption
- Specifies
whether drive encryption is allowed. This parameter is optional.Restriction:
- You can use drive encryption only for the following drives:
- Oracle StorageTek T10000B drives that have a format value of DRIVE, T10000B, or T10000B-C
- Oracle StorageTek T10000C drives that have a format value of DRIVE, T10000C, or T10000C-C
- You cannot specify Tivoli Storage Manager as the key manager for drive encryption of WORM (write once, read many) media. (Specifying both WORM=YES and DRIVEENCRYPTION=ON is not supported.)
- If encryption is enabled for a device class, and the device class is associated with a storage pool, the storage pool should not share a scratch pool with other device classes that cannot be encrypted. If a tape is encrypted, and you plan to use it on a drive that cannot be encrypted, you must manually relabel the tape before it can be used on that drive.
- ON
- Specifies that Tivoli Storage Manager is the key manager for drive encryption and allows drive encryption for empty storage pool volumes only if the application method is enabled. (Other types of volumes are not encrypted. For example, back up sets, export volumes, and database backup volumes are not encrypted.) If you specify ON and you enable another method of encryption, drive encryption is not allowed and backup operations fail.
- ALLOW
- Specifies that Tivoli Storage Manager does not manage the keys for drive encryption. However, drive encryption for empty volumes is allowed if another method of encryption is enabled.
- EXTERNAL
- Specifies that Tivoli Storage Manager does not manage the keys for drive encryption. Use this setting with an encryption methodology that is provided by another vendor and that is used with Application Method Encryption (AME) enabled on the drive. When you specify EXTERNAL and Tivoli Storage Manager detects that AME encryption is enabled, Tivoli Storage Manager does not turn off encryption. By contrast, when you specify ALLOW and Tivoli Storage Manager detects that AME encryption is enabled, Tivoli Storage Manager turns off encryption.
- OFF
- Specifies that drive encryption is not allowed. If you enable another method of encryption, backups fail. If you enable the application method, Tivoli Storage Manager disables encryption and backups are not attempted.
- You can use drive encryption only for the following drives: