Use the ECARTRIDGE device class when you are using StorageTek drives such as the StorageTek T9840 or T10000.
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-' +-T9840C----+ +-T9840C-C--+ +-T9840D----+ +-T9840D-C--+ +-T10000A---+ +-T10000A-C-+ +-T10000B---+ +-T10000B-C-+ +-T10000C---+ +-T10000C-C-+ +-T10000D---+ '-T10000D-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, for Oracle StorageTek T10000C drives with a format value of DRIVE, T10000C or T10000C-C, and for Oracle StorageTek T10000D drives with a format value of DRIVE, T10000D and T10000D-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 and Oracle StorageTek T10000D drives.- FORMAT
- Specifies the recording format to be used when
data is written to sequential access media. This parameter is optional.
If the drives are in a library that includes drives of different tape technology, do not use the DRIVE value. Use the specific format that the drives use.
- Important: 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.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 T10000D 8 TB Uncompressed T10000D format, using an Oracle StorageTek T10000 T2 cartridge T10000D-C 15 TB Compressed T10000D 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. T10000D drives can read, but cannot write, the T10000A, T10000B, and T10000C formats.
- ESTCAPacity
Specifies the estimated capacity for the volumes that are assigned to 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 one of the following unit indicators: K (kilobytes), M (megabytes), G (gigabytes), or T (terabytes). The smallest value that is accepted is 1 MB (ESTCAPACITY=1M).
For example, specify that the estimated capacity is 9 GB with the parameter ESTCAPACITY=9G.
To force the 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. The
maximum length of this prefix is 8 characters.
If you have a naming convention for media labels to support your current management system, use a volume prefix that conforms to your naming conventions.
Values that are specified for this parameter must meet the following conditions:- The value is to be made up of qualifiers, which can be a maximum
of eight characters including periods. For example, the following
value is acceptable:
AB.CD2.E - The qualifiers must be separated by a single period.
- The first letter of each qualifier must be alphabetic or national (@,#,$), followed by alphabetic, national, hyphen, or numeric characters.
An example of a tape volume data set name using the default prefix is ADSM.BFS.
- The value is to be made up of qualifiers, which can be a maximum
of eight characters including periods. For example, the following
value is acceptable:
- MOUNTRetention
- Specifies the number of minutes that an idle sequential access
volume is retained before it is dismounted. This parameter is optional.
You can specify a number 0 - 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.
Note: For environments in which devices are shared across storage applications, the MOUNTRETENTION setting must be carefully considered. This parameter determines how long an idle volume remains in a drive. Some media managers do not dismount an allocated drive to satisfy pending requests. You might need to tune this parameter to satisfy competing mount requests while maintaining optimal system performance. Typically, problems arise more frequently when the MOUNTRETENTION parameter is set to a value that is too small, for example, zero. - 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 0 - 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 0 - 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 and online in the library is used to calculate the true value.
- 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 in this device class that are used concurrently 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
- Oracle StorageTek T10000D drives that have a format value of DRIVE, T10000D, or T10000D-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 attempted.
- You can use drive encryption only for the following drives: