Quantum DLT 8000 Product Manual page 251

MODE SENSE (6) / (10) Command (1Ah / 5Ah) (continued)
Table 5–49 MODE SENSE Control Descriptor Block — Field Descriptions
Field Name
DBD
PC
Page Code
Allocation Length
MODE SENSE may be either MODE SENSE (6) or MODE SENSE (10). MODE SENSE
(6) data contains a 4-byte header followed by one 8-byte block descriptor, followed by
zero or more variable length pages, depending on the Page Code and Allocation Length.
Description
Disable Block Descriptors. If 0, device returns the block descriptor
data. If set to 1, block descriptor information is not returned.
Page Control. The Page Control field indicates the type of page
parameter values to be returned to the host.
PC Description
00 Report Current Values
01 Report Changeable Values
10 Report Default Values
11 Report Saved Values
This field allows the host to select any specific page or all of the
pages supported by the drive.
This field specifies the number of bytes that the host has allocated for
returned MODE SENSE data. An allocation length of zero indicates
that the drive will return no MODE SENSE data. This is not considered
an error, and GOOD status is returned.
Quantum DLT 8000 Tape System
SCSI Commands
5-107