Deskstar T7K500 Hard Disk Drive Specification
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12.37 Set Features (EFh)
Table 129: Set Features command (EFh)
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
Command Block Output Registers Command Block Input Registers
Register 7 6 5 4 3 2 1 0 Register 7 6 5 4 3 2 1 0
Data - - - - - - - - Data - - - - - - - -
Feature V V V V V V V V Error see below
Sector Count see note 1 Sector Count - - - - - - - -
Sector Number - - - - - - - - Sector Number - - - - - - - -
Cylinder Low - - - - - - - - Cylinder Low - - - - - - - -
Cylinder High - - - - - - - - Cylinder High - - - - - - - -
Device/Head 1 - 1 D - - - - Device/Head - - - - - - - -
Command 1 1 1 0 1 1 1 1 Status see below
Error Register Status Register
7654321 0 76543 21 0
CRC UNC 0 IDN 0 ABT T0N AMN BSY RDY DF DSC DRQ COR IDX ERR
00000V0 0 0V0-- 0- V
02H Enable write cache
03H Set transfer mode based on value in sector count register
05H Enable Advanced Power Management
06H Enable Power-up in Standby feature set
07H Power-up in Standby feature set device spin-up
09H Enable Address Offset mode
42H Enable Automatic Acoustic Management
44H 52 bytes of ECC apply on Read Long/Write Long commands
5DH Enable release interrupt
66H Disable reverting to power on defaults
82H Disable write cache
85H Disable Advanced Power Management
86H Disable Power-up in Standby mode
89H Disable Address Offset mode
AAH Enable read look-ahead feature
BBH 4 bytes of ECC apply on Read Long/Write Long commands
C2H Disable Automatic Acoustic Management
CCH Enable reverting to power on defaults
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