2 enclosure service information (esi) page format – Hitachi ULTRASTAR 15K450 HUS154530VLF400 User Manual

Page 258

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

242

19.27.2 Enclosure Service Information (ESI) Page Format

The drive supports the following enclosure pages as specified by the “SCSI-3 Enclosure Service (SES) Rev 8a” standard.
Please refer to that standard for more definition on these pages. Note that the drive does not attempt to process the information
in these pages, but only acts as a pass through node, to allow the initiator to communicate with the enclosure.

Table 204: Enclosure Page Support for Send and Receive Diagnostic Commands

These pages are formatted as in the following table.

Table 205: ESI Page Format

If the enclosure supports ’short’ mode, only page 08h is supported. If the enclosure supports ’long’ mode, pages 01h-0Fh are
supported.

Page Code

Send Diagnostic Command

Receive Diagnostic Command

01h

Reserved

Configuration

02h

Enclosure Control

Enclosure Status

03h

Reserved

Help Text

04h

String Out

String In

05h

Threshold Out

Threshold In

06h

Array Control

Array Status

07h

Reserved

Element Descriptor

08h

Reserved

Short Enclosure Status

09-0Fh

Reserved for SES

Reserved for SES

Byte

Bit

7

6

5

4

3

2

1

0

0

Page Code = 1h-0Fh

1

Page Specific

2

3

(MSB) Page Length

(LSB)

n

Page Specific

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