HGST Ultrastar 7K4000 (SAS) Hard Disk Drive Specification
152
18.10.6 Mode Page 04 (Rigid Disk Drive Geometry Parameters)
Table 108: Mode Page 04 (Rigid Disk Drive Geometry Parameters)
The rigid disk drive geometric page specifies various parameters for the drive.
• RPL = 0, Indicates that the drive does not support spindle synchronization.
Byte
Bit
76543210Default
0 PS 0 Page Code = 04h 04h
1 Page Length = 16h 16h
2-4
(MSB)
Number of Cylinders
(LSB)
xxh
xxh
5 Number of heads xxh
6-8
(MSB)
Starting Cylinder -
Write Precompensation = 0 (LSB)
00h
00h
9-11
(MSB)
Starting Cylinder -
Reduced Write Current = 0 LSB)
00h
00h
12-13
(MSB) Drive Step Rate = 0 (Not used)
(LSB)
00h
00h
14-16
(MSB)
Landing Zone Cylinder = 0 (Not used)
(LSB)
00h
00h
17 RESERVED = 0 RPL = 0 00h
18 Rotational Offset = 0 (Not used) 00h
19 RESERVED = 0 00h
20-21
(MSB) Medium Rotation Rate in RPM
(LSB)
1Ch
20h
22-23 Reserved = 0 00h
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