SCF Reference Manual for the Storage Subsystem (G06.28+, H06.05+, J06.03+)

NUMIO number
is the number of concurrent I/O operations that the Open SCSI IOP can have outstanding. This
value determines the size of the allocated data-buffer area. number is in the range 1 through
15. The default is 8.
PRIMARYCPU number
is the processor in which the primary IOP starts. The process must be in the STOPPED state or
not running for you to alter this attribute.
PRIMARYLOCATION ( group,module,slot )
is the location of the adapter that controls the primary path to the Open SCSI device.
PRIMARYPORTNAME number
is the Fibre Channel port name used by the primary path to the Open SCSI device. The number
should be entered as a 16-character hexadecimal number, without a leading %H.
PRIMARYSAC { number | name }
is the SAC that controls the primary path to the device.
is the SAC subdevice number on the adapter. If you specify PRIMARYSAC in number format,
you must also specify PRIMARYLOCATION.
number
is full name of the adapter location including the SAC number. For
example:SNDA.SAC-1.GRP-1.MOD-1.SLOT-53
name
PROGRAM [[$vol.]subvol.]fileid
is the object file name of the IOP. If not specified, PROGRAM is:
$SYSTEM.SYSTEM.TDSCSI
If you specify the program file name location as $SYSTEM.SYSTEM, the operating system first
searches for the file there and on the current SYSnn subvolume.
RECSIZE number
is the configured record size for the device (in bytes). This value is used by some utility programs
when making requests to the IOP. number is in the range 1 through 57344. The default is
4096. Larger block sizes should give better performance.
SCSIID number
is the device ID of the Open SCSI device. Each device on the same SCSI interface must have
a unique device ID. number is in the range 0 through 15 (6 and 7 are reserved for the
adapters). The default is 2.
STARTSTATE { STARTED | STOPPED }
specifies whether the IOP is available to other processes (STARTED) or unavailable (STOPPED)
when the system is loaded or reloaded. The default is STARTED.
STRUCTAREASIZE number
is the size (in kilobytes) of the memory area used for data structures. number is in the range
16 through 32. The default is 24.
TRACEBUFLEN number
is the size (in kilobytes) of the memory area used for internal tracing by the Open SCSI IOP.
number is in the range 32 through 65. The default is 33.
TRACELEVEL number
is the level of tracing used by the Open SCSI IOP. number is in the range 0 through 65,535.
The default is 65,535.
ALTER SCSI Example
See the procedure for “Altering Open SCSI Attribute Values” (page 176).
ALTER Command 239