SCF Reference Manual for the Storage Subsystem (G06.27+, H06.04+)

Storage Subsystem Commands
SCF Reference Manual for the Storage Subsystem—529937-008
14-66
ALTER TAPE Command
ALTER TAPE Attributes
[ , BACKUPCPU number ]
[ , COMPRESSION { ON | OFF } ]
[ , DENSITY { 1600 | 6250 } ]
[ , DEVICEID number ]
[ , HIGHPIN { ON | OFF } ]
[ , LOCATION (group,module,slot) ]
[ , LUN number ]
[ , MAXOPENS number ]
[ , PORTNAME number ]
[ , PRIMARYCPU number ]
[ , PROGRAM [[$vol.]subvol.]fileid ]
[ , RECSIZE number ]
[ , SAC { number | name } ]
[ , STARTSTATE { STARTED | STOPPED } ]
BACKUPCPU number
is the processor in which the backup IOP starts. The process must be in the
STOPPED state or not running for you to alter this attribute.
COMPRESSION { ON | OFF }
(cartridge tapes only) specifies whether data compression is configured.
This setting can be overridden by the MEDIACOM ALTER TAPEDRIVE
MEDIADEFS command. See the discussion on date compression in the DSM/Tape
Catalog User’s Guide.
DENSITY { 1600 | 6250 }
(5170 tape drives only) is the tape density in bpi. (Other tape drives use a
standard density which is displayed by the INFO TAPE command.) The default
is 6250.
DEVICEID number
is the device ID of the tape drive.
This value must match either the SCSI ID of the tape drive (if SCSI-connected) or
the device ID of the tape (if Fibre Channel connected).
If the tape drive is connected to a PMF CRU, an IOMF CRU, or an SNDA, number
is in the range 0 through 5. The default is 5.
If the tape drive is connected to an F-SAC of an SNDA, number is 4 or 5.
ON The tape process compresses data using Improved Data Recovery
Capability when writing to the cartridge tape (default).
OFF The tape process does not compress data when writing to the cartridge
tape.