Use the DLT device class when you are using DLT tape devices.
To issue this command, you must have system privilege or unrestricted storage privilege.
>>-DEFine DEVclass--device_class_name---------------------------> >--LIBRary--=--library_name--DEVType--=--DLT--------------------> .-WORM--=--No------. .-FORMAT--=--DRIVE--------. >--+------------------+--+-------------------------+------------> '-WORM--=--+-No--+-' '-FORMAT--=--+-DRIVE----+-' '-Yes-' +-DLT1-----+ +-DLT1C----+ +-DLT10----+ +-DLT10C---+ +-DLT15----+ +-DLT15C---+ +-DLT20----+ +-DLT20C---+ +-DLT35----+ +-DLT35C---+ +-DLT40----+ +-DLT40C---+ +-DLT2-----+ +-DLT2C----+ +-DLT4-----+ +-DLT4C----+ +-SDLT-----+ +-SDLTC----+ +-SDLT320--+ +-SDLT320C-+ +-SDLT600--+ +-SDLT600C-+ +-DLTS4----+ '-DLTS4C---' >--+----------------------+-------------------------------------> '-ESTCAPacity--=--size-' .-PREFIX--=--ADSM-------------------. >--+-----------------------------------+------------------------> '-PREFIX--=--+-ADSM---------------+-' '-tape_volume_prefix-' .-MOUNTRetention--=--60------. .-MOUNTWait--=--60------. >--+----------------------------+--+-----------------------+----> '-MOUNTRetention--=--minutes-' '-MOUNTWait--=--minutes-' .-MOUNTLimit--=--DRIVES-----. >--+---------------------------+------------------------------->< '-MOUNTLimit--=--+-DRIVES-+-' +-number-+ '-0------'
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.
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.
|
DLT1 | 40.0 GB | Uncompressed format, using only CompacTape
III cartridges Valid with DLT4000, DLT7000, and DLT8000 drives |
DLT1C | See note 1. 80.0 GB |
Compressed format, using only CompacTape
III cartridges Valid with DLT4000, DLT7000, and DLT8000 drives |
DLT10 | 10.0 GB | Uncompressed format, using only CompacTape
III cartridges Valid with DLT4000, DLT7000, and DLT8000 drives |
DLT10C | See note 1. 20.0 GB |
Compressed format, using only CompacTape
III cartridges Valid with DLT4000, DLT7000, and DLT8000 drives |
DLT15 | 15.0 GB | Uncompressed format, using only CompacTape
IIIxt cartridges Valid with DLT4000, DLT7000, and DLT8000 drives |
DLT15C | See note 1. 30.0 GB |
Compressed format, using only CompacTape
IIIxt cartridges Valid with DLT4000, DLT7000, and DLT8000 drives |
DLT20 | 20.0 GB | Uncompressed format, using only CompacTape
IV cartridges Valid with DLT4000, DLT7000, and DLT8000 drives |
DLT20C | See note 1. 40.0 GB |
Compressed format, using only CompacTape
IV cartridges Valid with DLT4000, DLT7000, and DLT8000 drives |
DLT35 | 35.0 GB | Uncompressed format, using only CompacTape
IV cartridges Valid with DLT7000 and DLT8000 drives |
DLT35C | See note 1. 70.0 GB |
Compressed format, using only CompacTape
IV cartridges Valid with DLT7000 and DLT8000 drives |
DLT40 | 40.0 GB | Uncompressed format, using CompacTape IV
cartridges Valid with a DLT8000 drive |
DLT40C | See note 1. 80.0 GB |
Compressed format, using CompacTape IV cartridges Valid with a DLT8000 drive |
DLT2 | 80.0 GB | Uncompressed format, using Quantum DLT tape VS1 media |
DLT2C | See note 1. 160.0 GB |
Compressed format, using Quantum DLT tape VS1 media |
DLT4 | 160.0 GB | Uncompressed format, using Quantum DLTtape VS1 cartridges. Valid with Quantum DLT-V4 drive |
DLT4C | See note 1. 320.0 GB |
Compressed format, using Quantum DLTtape VS1 cartridges. Valid with Quantum DLT-V4 drive |
SDLT See note 2. |
100.0 GB | Uncompressed format, using Super DLT Tape
1 cartridges Valid with a Super DLT drive |
SDLTC See note 2. |
See note 1. 200.0 GB |
Compressed format, using Super DLT Tape
1 cartridges Valid with a Super DLT drive |
SDLT320 See note 2. |
160.0 GB | Uncompressed format, using Quantum SDLT
I media Valid with a Super DLT drive |
SDLT320C See note 2. |
See note 1. 320.0 GB |
Compressed format, using Quantum SDLT I
media Valid with a Super DLT drive |
SDLT600 | 300.0 GB | Uncompressed format, using SuperDLTtape-II
media Valid with a Super DLT drive |
SDLT600C | See note 1. 600.0 GB |
Compressed format, using SuperDLTtape-II
media Valid with a Super DLT drive |
DLTS4 | 800 GB | Uncompressed format, using Quantum DLT S4 media. Valid with a DLT-S4 drive |
DLTS4C | See note 1. 1.6 TB |
Compressed format, using Quantum DLT S4 media. Valid with a DLT-S4 drive |
Note:
|
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).
For more information about estimated capacities, see Table 1.
If you previously established a media label naming convention that supports your current management system, use a volume prefix that conforms to your naming conventions.
AB.CD2.E
An example of a tape volume data set name that uses the default prefix is ADSM.BFS.
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.
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.