| PERSISTENT RESERVE OUT | 5Fh |
PERSISTENT RESERVE OUT is used to request service actions that create a persistent reservation in a logical unit within the tape drive for the exclusive or shared use of a particular I_T nexus. The command uses other service actions to manage and remove such persistent reservations.
An I_T nexus performing Persistent Reserve Out service actions is identified by a reservation key.
Illegal Field Reservation Deferred Error Unit Attention
Command descriptor block:
|
| 7 | 6 | 5 |
| 4 |
| 3 |
| 2 | 1 | 0 |
|
|
|
|
|
|
|
|
|
|
| ||
| 0 |
|
|
|
| Operation | Code (5Fh) |
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
| Reserved (0) |
|
|
|
|
| Service Action |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
| 2 |
| Scope |
|
|
|
|
|
| Type |
|
|
| 3 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Reserved (0) |
|
|
|
|
| ||
| 6 |
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
| |
| 7 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Parameter List Length |
|
|
|
| ||||
| 8 |
|
|
|
|
|
|
| ||||
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
| 9 |
|
|
|
| Control |
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
CDB fields:
Service Action | 00b | Register | Registers or unregisters a reservation key with the device |
|
|
| server. |
| 01b | Reserve | Creates the persistent reservation. |
| 02b | Release | Releases the persistent reservation. |
| 03h | Clear | Clears all reservation keys and the persistent reservation. |
| 04h | Preempt | |
|
|
| registrations. |
| 05h | Preempt and Abort | |
|
|
| registrations, and aborts all tasks for all |
|
|
| nexuses. |
| 06h | Register and | Registers or unregisters a reservation key with the device |
|
| Ignore Existing Key server. | |
|
|
| |
Scope | 0 | Indicates LU_SCOPE. | |
|
|
|
|
Commands
PERSISTENT RESERVE OUT 5Fh 101