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Fibre Channel Interface Manual, Rev. D 217
PS (Parameter Savable)
This bit is only used with the Mode Sense command. This bit is not used with the Mode Select command.
1 The drive is capable of saving the page in a nonvolatile vendor-specific location.
Rnd (Round)
1 The drive treats and reports rounded parameters as described in Section 11.6.
0 The drive rounds the parameter and handles command completion reporting as if the parameter had not been
rounded.
SCSI-2
1 The following SCSI-3 features are changed from their SCSI-3 definition to the SCSI-2 definition:
Control Mode Page (0Ah) Length from 0Ah to 06h.
Caching Page (08h) Length from 12h to 0Ah.
0 The SCSI-3 features remain as specified in other portions of this specification.
Self Seek
1 The drive will enter self seek mode for testing purposes. Such testing could include, but is not limited to, power dis-
sipation and acoustics. While in this mode, the drive will accept SCSI commands and will process them in between
the self seek operations, including a mode select to turn this bit back off. As such, this bit should be off for normal
drive operations.
0 The drive will not self seek; normal operating mode.
Strict
1 The drive checks for Initiator attempts to change unchangeable parameters. If the drive detects an attempt it rejects
the command in the standard way, i.e., Check Condition status from drive, Request Sense from the Initiator, Illegal
Request sense key (5h) back from the drive.
0 The drive ignores the values of the unchangeable parameters in a Mode Select command. The drive does not reject
the command trying to change unchangeable parameters.
Unit Attn (Unit Attention)
1 Unit Attention is logged in sense only; no Check Condition status is presented following any reset.
0 Check Condition is presented for all affected Initiators following a reset until Request Sense is issued by each Initia-
tor (as per current operation).
Note. Byte 3 is reserved for future compatibility with Seagate host adapters. Though presently may be
changeable (see S2 field definition), this byte does not control anything unless the individual drive’s
Product Manual indicates that it does and defines its use in the Mode Sense Data section.
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