6.Command Specification | MODE SENSE |
6.8.MODE SENSE (6/10) 1Ah and 5Ah
Table
Bit | 7 |
| 6 |
| 5 | 4 |
| 3 |
| 2 | 1 | 0 |
Byte |
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0 |
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| Operation | Code (1Ah) |
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1 |
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| Reserved |
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| DBD |
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| Reserved |
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2 |
| PCF |
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| Page | Code |
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3 |
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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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| Table |
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Bit | 7 |
| 6 |
| 5 | 4 |
| 3 |
| 2 | 1 | 0 |
Byte |
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0 |
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| Operation | Code (5Ah) |
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1 |
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| Reserved | LLBAA (0) |
| DBD |
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2 |
| PCF |
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| Page | Code |
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| Reserved |
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| Allocation Length |
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9 |
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| Control |
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The MODE SENSE (6/10) commands provide a means to report parameter of default, current and changeable configuration parameters. They are complementary to MODE SELECT (6/10) commands. The
The format of the data returned is different for the
LLBAA: The LLBAA function is not supported. This field must be ZERO. This field is defined for MODE SENSE 10 only.
If this field is not set to 0b for a MODE SENSE (10) command, the command terminates with CHECK CONDITION status, the sense key set to ILLEGAL REQUEST, the ASC/ASCQ is set to INVALID FIELD IN CDB.
DBD: A Disable Block Descriptors (DBD) bit of ZERO indicates that the target may return ZERO or more block descriptors in the returned MODE SENSE data at the target's discretion. A DBD bit of one specifies that the target will not return any block descriptors in the returned MODE SENSE data.
PC: The Page Control field indicates the type of page parameter values to be returned to the initiator as shown below.
Table
Bit 7 | Bit 6 | Parameter Values | Description |
0 | 0 | Current Values | This is the normal default situation where the drive returns to the |
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| initiator its current configuration. Page fields not supported are set to |
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| ZERO by the drive. |
0 | 1 | Changeable Values | These are any values which a initiator may alter in a subsequent |
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| MODE SELECT command. Any field that the drive allows to be |
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| changed is set to one. Otherwise the field is set to ZERO. |
1 | 0 | Default Values | These are the default values on |
1 | 1 | Saved Values | Not supported by the drive |
Page Code: This allows the initiator to select any specific or all pages supported by the drive.
SONY |
