Datasheet

Travelstar 80GN Hard Disk Drive Specification
153
13.33 Set Features (EFh)
Table 107: Set Features (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.
After the power on reset or hard reset the device is set to the following features as default.
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 - - - - - - - -
LBA Low - - - - - - - - LBA Low - - - - - - - -
LBA Mid - - - - - - - - LBA Mid - - - - - - - -
LBA High - - - - - - - - LBA High - - - - - - - -
Device 1 - 1 D - - - - Device - - - - - - - -
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
Write cache Enable
ECC bytes 4 bytes
Read look-ahead Enable
Reverting to power on defaults Disable
Address Offset mode Disable
02H Enable write cache (See note 2)
03H Set transfer mode based on value in sector count register
05H Reserved (See note 3)
09H Enable Address Offset mode
44H 40 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 Reserved (See note 3)
89H Disable Address Offset mode
AAH Enable read look-ahead feature
BBH
4 bytes of ECC apply on Read Long/Write Long commands
CCH
Enable reverting to power on defaults