Sony SDX-800V/R MAM attribute formats, Format Name Description, Standard device type attributes

12. Appendix E

The READ ONLY bit indicates whether the attribute is in the read only state. If the READ ONLY bit is one, the attribute is in the read only state. If the READ ONLY bit is zero, the attribute is in the read/write state.

The FORMAT field (table 12-5) specifies the format of the data in the ATTRIBUTE VALUE field. ATTRIBUTES defined by this standard include a requirement for the contents of the FORMAT field.

						Table 12-5: MAM attribute formats
Format			Name			Description
00b			BINARY			The ATTRIBUTE VALUE shall contain binary data.
01b			ACSII			The ATTRIBUTE VALUE field shall contain only graphic codes
						(i.e. byte code values 20h through &Eh), shall be left-aligned
						placing any unused bytes at the highest offset in the field,
						contain 20h (i.e. ASCII space) in any unused bytes.
10b			TEXT			The attribute contains textual data. The character set is as
						described in the TEXT LOCALIZATION IDENTIFER attribute.
11b			Reserved
		The ATTRIBUTE LENGTH field specifies the length in bytes of the ATTRIBUTE VALUE field.
		Attributes defined by this standard include a requirement for the contents of the ATTRIBUTE
		LENGTH field.
		The ATTRIBUTE VALUE Field contains that current (READ ATTRIBUTE) or desired (WRITE
		ATTRBUTE) value of the attribute.
		Attribute identifier values
		Attribute identifier values overview
		The values in the ATTRIBUTE IDENTIFIER field are assigned according to the attribute type
		and whether the attribute is standard or vendor unique (table 12-6).
				Table 12-6: MAM attribute identifier range assignments
Attribute Identifiers					Attribute Type		Standardization
0000h	– 03FFh				Device		Yes
0400h	– 07FFh				Medium		Yes
0800h	– 0BFFh				Host		Yes
0C00h – 0FFFh					Device		Vendor Unique
1000h	– 13FFh				Medium		Vendor Unique
1400h	– 17FFh				Host		Vendor Unique
1800h	– FFFFh				Reserved

Device servers shall accept and process a WRITE ATTRIBUTES command containing standardized host type attribute identifier values (i.e. 0800h-0BFFh) or vendor unique host type attribute identifier values (i.e., 1400h-17FFh). Standardized host type attribute identifier values may be checked for conformance to the requirements described later.

Standard device type attributes

Device types attributes (table 12-7) shall be maintained and updated by the device server when the medium and associated medium auxiliary memory are present. All supported medium type attributes shall have a status of read only.

12-4 SONY AIT-3Ex drive SDX-800V series Ver.1.1