Filter
Top Products
12.APPENDIX E: Medium Auxiliary Memory Attribute
12-2 SONY AIT-5 drive SDX-1100V series Ver.1.0
Table 12-2: MAM Attribute states
Attribute Type Attribute State Description
Read Only An application server may read the contents of the
attribute with the READ ATTRIBUTE command, but an
attempt to clear or change the attribute using the WRITE
ATTRIBUTE command will result in the command being
terminated with a CHECK CONDITION status. When the
READ ONLY bit is one, the attribute is in the read only
state.
Medium or Device
Unsupported The drive does not support the attribute and will not return
it in response to a READ ATTRIBUTE command.
Nonexistent A host attribute does not exist in the medium auxiliary
memory until a WRITE ATTRIBUTE command creates it.
Host
Read/Write The attribute has been created using the WRITE
ATTRIBUTE command. After the attribute has been
created, the contents may be altered using subsequent
WRITE ATTRIBUTE commands. A read/write attribute
may be returned to be nonexistent state using a WRITE
ATTRIBUTE command with the attribute length set to
zero. When the READ ONLY bit is zero, the attribute is in
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 12-3. This format will be used in the parameter data for the WRITE ATTRIBUTE command
and the READ ATTRIBUTE command. The attribute format in this standard implies nothing about the physical
representation of an attribute in the medium auxiliary memory.
Table 12-3: MAM ATTRIBUTE Format
Bit
Byte
7 6 5 4 3 2 1 0
0
1
(MSB)
ATTRIBUTE IDENTIFIER
(LSB)
2 READ
ONLY
Reserved FORMAT
3
4
(MSB)
ATTRIBUTE LENGTH (n-4)
(LSB)
5
N
(MSB)
ATTRIBUTE VALUE
(LSB)
The ATTRIBUTE IDENTIFIER field contains a code value identifying the attribute.