PR Generation | ||
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Reservation Key | The key under which the persistent reservation is held. | |
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Scope | 0 | Indicates LU_SCOPE. |
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Type | The characteristics of the persistent reservation currently held. Persistent reservation | |
| types supported by the drive are: | |
| 3h | Exclusive access |
| 6h | Exclusive access, registrants only |
| 8h | Exclusive access, all registrants |
See PERSISTENT RESERVE OUT for more information and also the appropriate standards.
Read Capabilities service action
This provides a mechanism for the drive to report which features of Persistent Reservation are implemented. The format of the data returned is as follows:
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| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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| 0 |
| (MSB) |
| Length (0008h) |
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| 1 |
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| (LSB) | |||
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| 2 |
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| Reserved (0) |
| CRH (1) | SIP_C (1) | ATP_C(0) | Rsvd(0) | PTPL_C(1) |
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| 3 |
| TMV (1) |
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| Reserved (0) |
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| PTPL_A | |
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| 4 |
| WR_EX_AR(0) | EX_AC_RO(1) | WR_EX_RO(0) | Rsvd(0) | EX_AC(1) | Rsvd(0) | WE_EXC(0) | Rsvd(0) |
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| 5 |
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| Reserved (0) |
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| EX_AC_AR(1) | |
| 6 |
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| Reserved (0) |
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| 7 |
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| PTPL_A | 0 Persist Through Power Loss has not been activated |
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1The most recent successfully completed PERSISTENT RESERVE OUT command with Register or Register and Ignore Existing Key service action had the APTPL bit set to one in the parameter data.
All the other fields are fixed. Refer to the description of PERSISTENT RESERVE OUT or the appropriate standards for more information.
the PERSISTENT RESERVE IN command, and clause 5.6 for a detailed discussion of reservations.
100 Commands