Hitachi HUS154530VLF400 User Manual

                   

Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification

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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.

• 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.