Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
133
Logical Block Reference Tag field.
• GRD_CHK (Guard Check) is set to one to indicate that the drive checks the Logical Block Guard Tag field in the pro-
tection information, if any.
• APP_CHK (Application Tag Check) bit is set to one to indicate that the drive checks the Logical Block Application
Tag field in the protection information, if any.
• REF_CHK (Reference Tag Check) bit is set to one to indicate that the drive checks the Logical Block Reference Tag
field in the protection information, if any.
• GROUP_SUP (Group Supported) bit is set to zero to indicate that the grouping function is not supported.
• PRIOR_SUP (Priority Supported) bit is set to zero to indicate that task priority is not supported.
• HEADSUP (Head of Queue Supported), ORDSUP (Ordered Supported), and SIMPSUP (Simple Supported) are set to
one to indicate support for Head of Queue, Ordered and Simple task attributes.
• NV_SUP (Non-volatile Supported) is set to 0 to indicated that non-volatile cache features are not supported.
• V_SUP (Volatile Supported) is set to 1 to indicated support of a volatile cache.
19.5.1.7 Inquiry Data Format - EVPD = 1, Page Code - 87h
• Policy Page Code set to 3Fh and Policy Subpage Code set to FFh indicate that the descriptor applies to all mode pages
and subpages
• MILUS (Multiple Logical Units Share) set to one indicates the policy is shared by multiple logical units.
• Mode Page Policy set to 00b indicates that all mode pages and subpages are shared.
19.5.1.8 Inquiry Data Format - EVPD = 1, Page Code - 88h
Byte
BIT
76543 2 1 0
0 Qualifier = 0 Peripheral Device Type = 0
1 Page Code = 87h
2-3 Page Length = 0004h
4 Reserved=0 Policy Page Code = 3Fh
5 Policy Subpage Code = FFh
6 MILUS=1 Reserved = 0 Mode PagePolicy = 0
7 Reserved = 0
Byte
BIT
76543 2 1 0
0 Qualifier = 0 Peripheral Device Type = 0
1 Page Code = 88h
2-3 Page Length = 48 (0030h)
4-5 Reserved=0
6-7 Primary Relative Port = 0001h
