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Table
Each of the codes provides handling instructions for READ operations, for WRITE operations, and for subsequent attempts to establish persistent reservations (referred to as “Additional Reservations Allowed” in the table).
Table
Code | Name | Description | |
|
| READS: Shared; any application client on any initiator may execute commands that | |
|
| perform transfers from the disk to the initiator. | |
0h | READ Shared | WRITES: Prohibited; any command from any initiator that performs a transfer from the | |
initiator to the disk results in a reservation conflict. | |||
|
| ADDITIONAL RESERVATIONS: Allowed; any initiator may reserve the logical unit, | |
|
| extents, or elements as long as the persistent reservations do not conflict with any res- | |
|
| ervations already known to the device server. | |
|
| READS: Shared; any application client on any initiator may execute commands that | |
|
| perform transfers from the disk to the initiator. | |
| WRITE Exclu- | WRITES: Exclusive; any command from any initiator other than the initiator that holds | |
1h | the persistent reservation that attempts a transfer to the disk results in a reservation con- | ||
sive | flict | ||
| |||
|
| ADDITIONAL RESERVATIONS: Allowed; any initiator may reserve the logical unit, | |
|
| extents, or elements as long as the persistent reservations do not conflict with any res- | |
|
| ervations already known to the device server. | |
|
| READS: Exclusive; any command from any initiator other than the initiator that holds | |
|
| the persistent reservation that attempts a transfer from the disk results in a reservation | |
|
| conflict | |
2h | READ Exclusive | WRITES: Shared; any application client on any initiator may execute commands that | |
perform transfers to the disk from the initiator. | |||
|
| ||
|
| ADDITIONAL RESERVATIONS: Allowed; any initiator may reserve the logical unit, | |
|
| extents, or elements as long as the persistent reservations do not conflict with any res- | |
|
| ervations already known to the device server. | |
|
| READS: Exclusive; any command from any initiator other than the initiator holding the | |
|
| persistent reservation that attempts a transfer from the disk results in a reservation con- | |
|
| flict. | |
|
| WRITES: Exclusive; any command from any initiator other than the initiator holding | |
|
| the persistent reservation that attempts a transfer to the disk results in a reservation con- | |
3h | Exclusive Access | flict. | |
| |||
|
| ADDITIONAL RESERVATIONS: Restricted; any PERSISTENT RESERVATION | |
|
| OUT command with the Reserve service action from any initiator other than the initiator | |
|
| holding the persistent reservation results in a reservation conflict. The initiator that | |
|
| holds the persistent reservation can reserve the logical unit, extents, or elements as long | |
|
| as the persistent reservations do not conflict with any reservations already known to the | |
|
| device server. |
Maxtor Atlas 10K V |