Product manual

3.4.2 Rezero Unit command (01
H
)
The Rezero Unit command retracts the read/write heads to the cylinder
containing logical block zero.
Bytes
Bits
76543210
000000001
1 LUN 00000
200000000
300000000
400000000
500000000
3.4.3 Request Sense command (03
H
)
The Request Sense command requests the drive to transfer sense data
to the initiator in the additional sense data format. The additional sense
format is described in Appendix B on page 91.
The sense data applies to the previous command on which a check
condition status was returned. This sense data is saved for the initiator
until:
• The initiator requests the sense data using the Request Sense com-
mand, or
• Another command is received from the initiator that issued the original
command that caused the check condition status.
If any of the following fatal errors occur during a Request Sense com-
mand, the drive sends a check condition status, and the sense data may
be invalid.
• The drive receives a nonzero reserved bit in the CDB.
• An unrecovered parity error occurs on the data bus.
• A malfunction prevents return of sense data.
If any other error occurs during the Request Sense command, the drive
returns sense data with a good status.
38 Medalist Pro 2160N/2160WC Product Manual, Rev. A