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FUJITSU MHW2120BS User Manual

Page 154

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Interface

Table 5.30 FEATURE CONTROL COMMAND

Byte Name Value

Description

000h
001h

Action Code

0004h

FEATURE CONTROL COMMAND

0001h

Set New State

Return Current State

002h
003h

Function Code

0003h

Return Option Flag

Current Option Flag is displayed in SN/SC field.

0001h Write

Cache

0002h

Write Reordering

004h
005h

Feature Code

0003h

Set time interval for temperature logging

Feature Code = 0001h (Set Write Cache)

0001h: Allow write cache operation to be determined

by ATA Set Feature command.

0002h: Force Write Cache enabled.
0003h: Force Write Cache disable.

Feature Code = 0002h(Set Write Reordering)

0001h: Enable Write Reordering
0002h: Disable Write Reordering

006h
007h

New State

(2 byte)

Feature Code = 0003h(Set time interval)

0000h: Invalid
0001h-FFFFh: Logging interval in minutes
(ex.) 0001h: Temperature data collection

interval is 1min.

000Fh: Temperature data collection

interval is 15min.

008h
009h

Option Flag

(2 byte)

Bit 15-1: Reserved
Bit0: 1 = Maintain the state at COMRESET/Power

cycle.

0 = Revert to default setting at

COMRESET/Power cycle.

00Ah

to

1FFh

(Reserved) -

Reserved

0002h

Current Feature Control State is displayed in SN/SC
field.

5-80

C141-E249

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