Release 6-byte (17h) and Release 10-byte (57h)

Release (17h and 57h) releases a unit reservation of the library. Only the initiator that made the reservation can release the reservation. The 10-byte Release command (57h) enables the initiator to release unit reservations of the library as set using a previous Reserve command and optionally to perform a release for a third party initiator.

If another initiator attempts to release a unit reservation, the library returns Good (00h) status, but does not release the reservation. If the library has no active reservations, requesting a release does not cause an error.

Figure 2-21 6-Byte Command

Description of "Figure 2-21 6-Byte Command"

Figure 2-22 10-Byte Command

Description of "Figure 2-22 10-Byte Command"

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.