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Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
171
19.10.1.3 Page Descriptor
Table 145: Mode Parameter Page Format
Each mode page contains a page code, a page length, and a set of mode parameters.
When using the MODE SENSE command, a Parameter Savable (PS) bit of one indicates that the mode page can be saved by
the drive in the reserved area of the drive. A PS bit of zero indicates that the supported parameters cannot be saved. When
using the MODE SELECT command, the PS bit is reserved (zero).
SPF (Sub-Page Format) is set to zero to indicate the short page format is used. The bit is set to one to indicate the long format
is used, supporting sub-pages. The drive supports the following mode page codes:
Table 146: Mode Parameter Page Format
The page length field specifies the length in bytes of the mode parameters that follow. If the Initiator does not set this value to
the value that is returned for the page by the MODE SENSE command, the drive will terminate the command with Check Con-
dition status.
Byte 0 PS SPF Page Code
Byte 1 Page Length
Byte 2-n Mode Parameters
Page Description PS
00 Vendor Unique Parameters 1
01 Read-Write Error Recovery Parameters 1
02 Disconnect/Reconnect Control Parameters 1
03 Format Device Parameters 0
04 Rigid Disk Geometry Parameters 0
07 Verify Error Recovery Parameters 1
08 Caching Parameters 1
0A Control Mode Page 1
0C Notch Parameters 1
19 Port Control Page 1
1A Power Control Parameters 1
1C Informational Exceptions Control 1