Seagate Medalist 2160WC (ST52160WC) Manual descargar pdf (Pagina 48)

3.4.2 Rezero Unit command (01

)

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

)

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

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Seagate Medalist 2160WC (ST52160WC) Manual Pagina 48