Sony SDX-800V/R User Manual

 

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

12-3

Table 12-3: MAM Attribute states 

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 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. 

Medium or 
Device 

Unsupported 

The device server does not support the attribute and 

shall 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 (8Ch) and write (8Dh) attribute commands will be implemented follows.

 

 

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. 

(MSB) 

ATTRIBUTE IDENTIFIER 

(LSB)

READ 

ONLY 

Reserved FORMAT 

(MSB) 

ATTRIBUTE LENGTH (n-4) 

(LSB)

(MSB) 

ATTRIBUTE VALUE 

(LSB)

 

The ATTRIBUTE IDENTIFIER field contains a code value identifying the attribute.