Request Sense Command (03H); Sense Data Availability - Quantum Atlas 10K II 9.2/18.4/36.7/73.4 GB Product Manual

5.34

REQUEST SENSE Command (03h)

The REQUEST SENSE command causes the drive to transfer detailed sense data to
the initiator. The drive maintains sense data on an individual initiator basis.
Bit 7
Byte
0
1 - 3
4
5
Figure 5–84 REQUEST SENSE Command Descriptor Block — Data Format
Table 5–82 REQUEST SENSE Command Descriptor Block—Field Description
Field
Allocation Length

5.34.1 Sense Data Availability

Sense data is available if the initiator is responsible for an in-progress FORMAT
UNIT command (Format Progress Indication is available in the Format Progress
Indication Bytes).
The drive returns a sense key of NO SENSE and an additional sense code of NO
ADDITIONAL SENSE INFORMATION if it has no sense data available for the
initiator.
For Parallel SCSI disk drives, sense data is available if the previous command from
the initiator terminated with a CHECK CONDITION status, or if the previous
command from the initiator ended with an unexpected BUS FREE error.
Quantum Atlas 10K II Ultra160/m SCSI Hard Disk Drives
6 5 4
Operation Code (03h)
Reserved
Allocation Length
Description
The drives can return a maximum of 18 bytes of sense data. The initiator
should set this field to the maximum value to receive all the sense data.
3 2
Control
SCSI Description
1 0
5–171