| MODE SENSE | 1Ah/5Ah |
MODE SENSE allows the drive to return its current configuration and report which configuration parameters can be changed through MODE SELECT.
The mode sense header, block descriptor (optional), and zero or more of the are sent to the host. Mode pages contain drive configuration parameters. Some of these parameters are fixed, others are configurable (through the MODE SELECT command). The host should use MODE SENSE to determine which drive parameters are configurable and what their current values are before using mode select to alter them.
NOTE: See MODE SELECT on page 71 for full descriptions of the Mode Parameters.If a MODE SENSE command is issued whilst an immediate reported Load command is executing or close to completing then the values of some parameters in some mode pages which depend on the results of the load may be undefined.
Similarly, the
Illegal Field | Reservation | Deferred Error | Unit Attention |
The page code field must contain a valid mode page code or the value 0 or the value 3Fh. If it does not then CHECK CONDITION status is reported. Sense data will be as described in the Illegal Field Checks.
Command descriptor block:
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| 7 | 6 |
| 5 | 4 |
| 3 | 2 | 1 | 0 |
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| 0 |
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| Operation Code (1Ah) |
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| 1 |
| Reserved (0) |
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| DBD |
| Reserved (0) |
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| 2 |
| PC |
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| Page Code |
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| 3 |
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| Sub Page Code |
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| 4 |
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| Allocation Length |
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| 5 |
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| Control |
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96 Commands