Reserve 6-byte (16h) and Reserve 10-byte (56h)

Reserve allows the initiator to reserve the entire library or partition. Another capability of the Reserve (10) command as opposed to the Reserve (6) command is the ability to do third party reservations. The third party reservation allows the reservation of a logical unit within a logical unit on behalf of another SCSI device. New host applications should not use 3rd party reservations. These are legacy SPC-2 commands. Persistent Reservations should instead be implemented.

Figure 2-23 Reserve 6-Byte

Description of "Figure 2-23 Reserve 6-Byte"

Figure 2-24 Reserve 10-Byte

Description of "Figure 2-24 Reserve 10-Byte"

3rdpty

This field indicates whether the reservation is on behalf of a third party or not.

0 = The reservation is on behalf of the calling requester.

1 = The reservation is on behalf of a specified Third party Device Id.

Long ID

The library ignores this field.

Third Party Device ID

ID of the third party device.

Parameter List Length

The library ignores this field.