Product manual

Byte 1
The
medium type field is always 00
H
, which means that the
drive is a direct-access device.
Byte 3
If the
block descriptor length is 8 bytes, a block descriptor
is sent to the drive. If the
block descriptor length is 0 bytes,
no block descriptor is sent to the drive.
Byte 4
The
density code is always 00
H
and cannot be changed.
Bytes 5–7
The
number of blocks is equal to the guaranteed sectors,
which is listed in the formatted capacity section of the
appropriate product manual.
Bytes 9–11
The
block length is always 0200
H
and cannot be changed.
Note.
Bytes 4–11 will be provided if the initiator requests the Block
Descriptor.
3.4.11 Reserve (6) command (16
H
)
When the initiator issues a Reserve command, it requests that the drive
be reserved for exclusive use by the initiator until the reservation is:
• Superseded by another Reserve command from the initiator that
made the reservation. An initiator that has already reserved the drive
can modify that reservation by issuing another Reserve command.
When the drive receives the superseding Reserve command, the
previous reservation is canceled.
• Released by a Release command from the same initiator. See the
Release command in Section 3.4.12 on page 52.
• Released by a bus device reset message from any initiator.
• Released by a hard reset.
After the drive honors the reservation from one initiator, it accepts
Inquiry, Request Sense and Reserve and Release commands from other
initiators; the drive rejects all other commands with a reservation conflict
status.
Note.
For the ST52160WC, the Release (6) command cannot release
SCSI ID’s 8–15. Use the Release (10) command.
Medalist Pro 2160N/2160WC Product Manual, Rev. A 51