IBM DTLA-305040 Hard Drive Specifications - Page 166

Set Features EFh

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12.28 Set Features (EFh) Command Block Output Registers Register 7 6 5 4 3 2 1 0 Data Feature V V V V V V V V Sector Count Note 1 Sector Number Cylinder Low Cylinder High Device/Head 1 - 1 D - - - - Command 1 1 1 0 1 1 1 1 Command Block Input Registers Register 7 6 5 4 3 2 1 0 Data Error see below Sector Count Sector Number Cylinder Low Cylinder High Device/Head Status see below Error Register 76543210 CRC UNC 0 IDN 0 ABT T0N AMN 00000V00 Status Register 7 6 5 4 3 2 10 BSY RDY DF DSC DRQ COR IDX ERR 0 V 0 - - 0 -V Figure 118. Set Features Command (EFh) The Set Feature command is to establish the following parameters which affect the execution of certain features as shown in below table. ABT will be set to 1 in the Error Register if the Feature register contains any undefined values. Output parameters to the device Feature Destination code for this command. 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 40 bytes of ECC apply on Read Long/Write Long commands 55H Disable read look-ahead feature Deskstar 40GV & 75GXP hard disk drive specifications 154

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12.28 Set Features (EFh)
see below
Status
1 1 1 0 1 1 1 1
Command
- - - - - - - -
Device/Head
1 - 1 D - - - -
Device/Head
- - - - - - - -
Cylinder High
- - - - - - - -
Cylinder High
- - - - - - - -
Cylinder Low
- - - - - - - -
Cylinder Low
- - - - - - - -
Sector Number
- - - - - - - -
Sector Number
- - - - - - - -
Sector Count
Note 1
Sector Count
see below
Error
V V V V V V V V
Feature
- - - - - - - -
Data
- - - - - - - -
Data
7 6 5 4 3 2 1 0
Register
7 6 5 4 3 2 1 0
Register
Command Block Input
Registers
Command Block Output
Registers
V
–
0
–
–
0
V
0
0
0
V
0
0
0
0
0
ERR
IDX
COR
DRQ
DSC
DF
RDY
BSY
AMN
T0N
ABT
0
IDN
0
UNC
CRC
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
Status Register
Error Register
Figure 118. Set Features Command (EFh)
The Set Feature command is to establish the following parameters which affect the execution of certain
features as shown in below table.
ABT will be set to 1 in the Error Register if the Feature register contains any undefined values.
Output parameters to the device
Feature
Destination code for this command.
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
40 bytes of ECC apply on Read Long/Write Long commands
55H
Disable read look-ahead feature
Deskstar 40GV & 75GXP hard disk drive specifications
154