Set Features (Efh); Set Transfer Mode; Write Cache; Advanced Power Management - Hitachi T7K250 - Deskstar - Hard Drive Specifications

12.39 Set Features (EFh)

Table 117: Set Features command (EFh)
Command Block Output Registers
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
7 6 5
CRC UNC 0
0 0 0
The Set Feature command establishes the following parameters which affect the execution of certain features as
shown in the table below.
ABT will be set to 1 in the Error Register if the Feature register contains any undefined values.
Output parameters to the device
02H
03H
05H
06H
07H
09H
42H
44H
55H
5DH
66H
82H
85H
86H
89H
AAH
BBH
C2H
CCH
DDH
7 6 5 4 3 2 1 0
- - - - - - - -
V V V V V V V V
see note 1
- - - - - - - -
- - - - - - - -
- - - - - - - -
1 - 1 D - - - -
1 1 1 0 1 1 1 1
Error Register
4 3 2 1
IDN 0 ABT T0N AMN
0 0 V 0
Enable write cache
Set transfer mode based on value in sector count register
Enable Advanced Power Management
Enable Power-up in Standby feature set
Power-up in Standby feature set device spin-up
Enable Address Offset mode
Enable Automatic Acoustic Management
52 bytes of ECC apply on Read Long/Write Long commands
Disable read look-ahead feature
Enable release interrupt
Disable reverting to power on defaults
Disable write cache
Disable Advanced Power Management
Disable Power-up in Standby mode
Disable Address Offset mode
Enable read look-ahead feature
4 bytes of ECC apply on Read Long/Write Long commands
Disable Automatic Acoustic Management
Enable reverting to power on defaults
Disable release interrupt
Deskstar T7K250 Hard Disk Drive Specification
Command Block Input Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
0 7 6
BSY RDY DF DSC DRQ
0 0 V
188
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
Status Register
5 4 3 2
COR IDX
0 - - 0
1 0
ERR
- V