Use the 8MM device class when you are using 8 mm tape devices.
To issue this command, you must have system privilege or unrestricted storage privilege.
>>-DEFine DEVclass--device_class_name---------------------------> >--LIBRary--=--library_name--DEVType--=--8MM--------------------> .-WORM--=--No------. .-FORMAT--=--DRIVE-----. >--+------------------+--+----------------------+---------------> '-WORM--=--+-No--+-' '-FORMAT--=--+-DRIVE-+-' '-Yes-' +-8200--+ +-8200C-+ +-8500--+ +-8500C-+ +-8900--+ +-AIT---+ +-AITC--+ +-M2----+ +-M2C---+ +-SAIT--+ +-SAITC-+ +-VXA2--+ +-VXA2C-+ +-VXA3--+ '-VXA3C-' >--+----------------------+-------------------------------------> '-ESTCAPacity--=--size-' .-PREFIX--=--ADSM-------------------. >--+-----------------------------------+------------------------> '-PREFIX--=--+-ADSM---------------+-' '-tape_volume_prefix-' .-MOUNTRetention--=--60------. .-MOUNTWait--=--60------. >--+----------------------------+--+-----------------------+----> '-MOUNTRetention--=--minutes-' '-MOUNTWait--=--minutes-' .-MOUNTLimit--=--DRIVES-----. >--+---------------------------+------------------------------->< '-MOUNTLimit--=--+-DRIVES-+-' +-number-+ '-0------'
Refer to the Administrator's Guide for more information.
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 Medium Type |
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.
|
8200 | 2.3 GB | Uncompressed (standard) format, using standard 112-meter tape cartridges |
8200C | See note 3.5 GB 4.6 GB |
Compressed format, using standard 112-meter tape cartridges |
8500 15m |
See note 600 MB |
Drives (Read Write) Eliant 820 (RW) |
8500C 15m |
See note 1.2 GB |
Drives (Read Write) Eliant 820 (RW) |
8900 15m |
See note – |
Drive (Read Write) Mammoth 8900 (R) |
AIT SDX1–25C |
See note 25 GB |
Drive AIT, AIT2 and AIT3 drives |
AITC SDX1–25C |
See note 50 GB |
Drive AIT, AIT2 and AIT3 drives |
M2 75m |
See note 20.0 GB |
Drive (Read Write) Mammoth II (RW) |
M2C 75m |
See note 50.0 GB |
Drive (Read Write) Mammoth II (RW) |
SAIT | See note 500 GB |
Drive (Read Write) Sony SAIT1–500(RW) |
SAITC | See note 1300 GB (1.3 TB) |
Drive (Read Write) Sony SAIT1–500(RW) |
VXA2 V6 (62m) |
See note 20 GB |
Drive (Read Write) VXA–2 |
VXA2C V6 (62m) |
See note 40 GB |
Drive (Read Write) VXA–2 |
VXA3 X6 (62m) |
See note 40 GB |
Drive (Read Write) VXA–3 |
VXA3C X6 (62m) |
See note 80 GB |
Drive (Read Write) VXA–3 |
Note: The actual capacities might vary depending on which
cartridges and drives are used.
|
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.
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.
AB.CD2.E
An example of a tape volume data set name using 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.
define devclass 8mmtape devtype=8mm library=auto
format=drive mountlimit=2 mountretention=10
prefix=adsmvol estcapacity=6G