Hitachi HUS154530VLF400, HUS154545VLF400 19.10.11 Mode Page 0C (Notch Parameters)

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

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19.10.11 Mode Page 0C (Notch Parameters)

Table 156:Page 0C (Notch Parameters)

The notch page contains parameters for direct-access devices that implement a variable number of blocks per cylinder. Each

section of the logical unit with a different number of blocks per cylinder is referred as a notch. The only field that is change-

able is the Active Notch field.

•ND = One meaning that this device is a notched drive.

•LPN = Zero meaning that the notches are based upon physical parameters of the drive (cylinder #), not logical parame-

ters.

•Maximum Number of Notches is the number of notches the drive can support. This value is drive model dependent.

•Active Notch indicates to which notch subsequent MODE SELECT/SENSE command parameters pertain. A value of 0

is used for parameter values which apply to all notches. Values from 1 to the maximum value depending on the model

specify the notch number, where notch 1 is the outermost notch. Following mode parameters are based on the current

active notch:

•Mode Page 2

- Read Buffer Full Ratio

- Write Buffer Empty Ratio

•Mode Page 3

- Alternate Sector per Zone

- Alternate Track per Zone

Byte Bit

76543210Default

0 PS 0 Page Code = 0Ch 8Ch

1 Page Length = 16h 16h

2 ND=1 LPN=0 Reserved = 0 80h

3 Reserved = 0 00h

4-5 (MSB) Maximum Number of Notches

(LSB)

XXh

6-7 (MSB) Active Notch

(LSB)

00h

8-11

(MSB)

Starting Boundary

(LSB)

XXh

12-15

(MSB)

Ending Boundary

(LSB)

XXh

16-23

(MSB)

Pages Notched

(LSB)

0000h

100Ch