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12.APPENDIX E: Medium Auxiliary Memory Attribute
SONY AIT-5 drive SDX-1100V series Ver.1.0 12-3
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 12-4) 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 12-4: MAM attribute formats
Format Name Description
00b BINARY The ATTRIBUTE VALUE will contain binary data.
01b ACSII The ATTRIBUTE VALUE field will contain only graphic codes (i.e.
byte code values 20h through &Eh), will 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.
12.4.2. Attribute Identifier Values
The values in the ATTRIBUTE IDENTIFIER field are assigned according to the attribute type and whether the
attribute is standard or vendor unique (
Table 12-5).
Table 12-5: 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
Drive will 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.
12.4.3. Standard Device Type Attributes
Device types attributes (Table 12-6) will be maintained and updated by the drive when the medium and associated
medium auxiliary memory are present. All supported medium type attributes will have a status of read only.