Ultrastar SSD400S.B OEM Specification (Non

16.10.6 Mode Page 04 (Rigid Disk Drive Geometry Parameters)

Table 93: Mode Page 04 (Rigid Disk Drive Geometry Parameters)

Byte

0

1

2-4

5

6-8

9-11

12-13

14-16

17

18

19

20-21

7

PS

(MSB)

6

0

5 4

Bit

3 2

Page Code = 04h

Page Length = 16h

Number of Cylinders

1 0 Default

04h

16h

00h

(LSB)

00h

(MSB)

(MSB)

Number of heads 00h

00h

Starting Cylinder -

Write Precompensation = 0 (LSB)

00h

(MSB) 00h

Starting Cylinder -

Reduced Write Current = 0 LSB)

00h

(MSB) Drive Step Rate = 0 (Not used)

00h

(LSB)

00h

Landing Zone Cylinder = 0 (Not used)

RESERVED = 0

Rotational Offset = 0 (Not used)

RESERVED = 0

RPL = 0

00h

(LSB)

00h

00h

00h

(MSB) Medium Rotation Rate

Reserved = 0

00h

00h

(LSB)

01h

00h 22-23

The rigid disk drive geometric page specifies various parameters for the drive.

• Medium Rotation Rate = 1 indicates the drive is an SSD.

HGST Ultrastar SSD400S.B (SAS) Solid State Drive Specification

123