Sony SDX-800V/R manual MAM Attribute states, Attribute Type, MAM Attribute Format Bit Byte

			12. Appendix E
		Table 12-3: MAM Attribute states
Attribute Type	Attribute State		Description
Medium or	Read Only		An application server may read the contents of the
Device			attribute with the READ ATTRIBUTE command, but
			an attempt to clear or change the attribute using the
			WRITE ATTRIBUTE command shall 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.
	Unsupported		The device server does not support the attribute and
			shall not return it in response to a READ ATTRIBUTE
			command.
Host	Nonexistent		A host attribute does not exist in the medium auxiliary
			memory until a WRITE ATTRIBUTE command
			creates it.
	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 (8Ch) and write (8Dh) attribute commands will be implemented follows.

12.6.MEDIUM AUXILIARY MEMORY ATTRIBUTE DATA

Attribute Format

Each medium auxiliary memory attribute shall be communicated between the application client and device server in the format shown in table 14.0. This format shall 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 12-4: MAM ATTRIBUTE Format

Bit 7 6 5 4 3 2 1 0

Byte

0(MSB)

1 ATTRIBUTE IDENTIFIER

(LSB)

2	READ	Reserved	FORMAT
	ONLY

3(MSB)

	ATTRIBUTE LENGTH (n-4)
4
	(LSB)

5(MSB)

	ATTRIBUTE VALUE
N
	(LSB)
	The ATTRIBUTE IDENTIFIER field contains a code value identifying the attribute.

SONY AIT-3Ex drive SDX-800V series Ver.1.1 12-3