12.APPENDIX E: Medium Auxiliary Memory Attribute
Table 12-2: MAM Attribute states
Attribute Type | Attribute State | Description |
Medium or Device | Read Only | An application server may read the contents of the |
|
| attribute with the READ ATTRIBUTE command, but an |
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| attempt to clear or change the attribute using the WRITE |
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| ATTRIBUTE command will result in the command being |
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| terminated with a CHECK CONDITION status. When the |
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| READ ONLY bit is one, the attribute is in the read only |
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| state. |
| Unsupported | The drive does not support the attribute and will not return |
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| it in response to a READ ATTRIBUTE command. |
Host | Nonexistent | A host attribute does not exist in the medium auxiliary |
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| memory until a WRITE ATTRIBUTE command creates it. |
| Read/Write | The attribute has been created using the WRITE |
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| ATTRIBUTE command. After the attribute has been |
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| created, the contents may be altered using subsequent |
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| WRITE ATTRIBUTE commands. A read/write attribute |
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| may be returned to be nonexistent state using a WRITE |
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| ATTRIBUTE command with the attribute length set to |
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| zero. When the READ ONLY bit is zero, the attribute is in |
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| the read/write state. |
Read and Write Attribute Commands:
The READ ATTRIBUTE (8Ch) and WRITE ATTRIBUTE (8Dh) commands will be implemented as follows.
12.4.MEDIUM AUXILIARY MEMORY ATTRIBUTE DATA
12.4.1.Attribute Format
Each medium auxiliary memory attribute will be communicated between the application client and drive in the format shown in Table
Table 12-3: MAM ATTRIBUTE Format
Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
Byte
0(MSB)
|
| ATTRIBUTE IDENTIFIER |
|
1 |
| (LSB) | |
|
| ||
|
|
| |
2 | READ | Reserved | FORMAT |
| ONLY | ||
|
|
|
3(MSB)
| ATTRIBUTE LENGTH | |
4 | ||
(LSB) | ||
|
5(MSB)
| ATTRIBUTE VALUE | |
N | ||
(LSB) | ||
|
The ATTRIBUTE IDENTIFIER field contains a code value identifying the attribute.
SONY |
