Set Features (Efh); Table 116: Set Features (Efh) - Hitachi HTS421212H9AT00 - Travelstar 120 GB Hard Drive Specifications

13.34 Set Features (EFh)

Table 116: Set Features (EFh)

Command Block Output Registers
Register
Data
Feature
Sector Count
LBA Low
LBA Mid
LBA High
Device
Command
Error Register
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.
After the power on reset or hard reset the device is set to the following features as default.
Write cache
ECC bytes
Read look-ahead
Reverting to power on defaults
Address Offset mode
Output parameters to the device
Feature Destination code for this command
02H Enable write cache (See note 2)
03H Set transfer mode based on value in sector count register
05H Enable Advanced Power Management
Enable Power-Up in Standby feature set
06H
07H Power-Up in Standby feature set device spin-up
09H Enable Address Offset mode
42H Enable Automatic Acoustic Management feature set
44H 52 bytes of ECC apply on Read Long/Write Long commands
55H Disable read look-ahead feature
66H Disable reverting to power on defaults
82H Disable write cache
85H Disable Advanced Power Management (see note 3)
7 6 5 4 3 2 1 0
- - - - - - - -
V V V V V V V V
see note 1
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - D - - - -
1 1 1 0 1 1 1 1
4 3 2 1
IDN 0 ABT T0N AMN
0 0 V 0
Enable
4 bytes
Enable
Disable
Disable
Travelstar 4K120 Hard Disk Drive Specification
Command Block Input Registers
Register
Data
Error
Sector Count
LBA Low
LBA Mid
LBA High
Device
Status
0 7 6 5
BSY RDY DF DSC DRQ
0 0 V 0
163
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
Status Register
4 3 2 1
COR IDX
- - 0 -
0
ERR
V