Reserve Command (16 H ) - Seagate MEDALIST 1080SL Product Manual

Medalist 1080sl SCSI Product Manual, August 1995
The medium type field is always 00
Byte 1
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
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
3.4.11 Reserve command (16
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Superseded by another Reserve command from the initiator that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.
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 only
Request Sense and Inquiry commands from other initiators; the drive
rejects all other commands with a reservation conflict status.
Bytes
7 6
0 0 0
1 LUN
2 0 0
3 0 0
4 0 0
5 0 0
Byte 1 If the 3rd pty bit is 0, the initiator reserves the drive for itself. If
the 3rd pty bit is 1, the initiator reserves the drive for another
, which means that the
H
and cannot be changed.
H
and cannot be changed.
H
)
H
Bits
5 4 3 2
0 1 0 1
3rd pty 3rd party device ID
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
45
1 0
1 0
Extent
0 0
0 0
0 0
0 0