IBM DJSA-210 Hard Drive Specifications - Page 122

Enable/Disable Delayed Write FAh: vendor specific, Output Parameters To The Device, Feature

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13.2 Enable/Disable Delayed Write (FAh: vendor specific) 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 Sector Number Cylinder Low Cylinder High Device/Head 1 - 1 D - - - - Command 1 1 1 1 1 0 1 0 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 0 0 - - 0 -V Figure 72. Enable/Disable Delayed Write command (FAh) The Enable/Disable Delayed Write command sets if the Delayed Write function is enabled or disabled. Delayed Write function is enabled or disabled according to the feature register's value. Even if the Delayed Write function is enabled by this command, Delayed Write does not work when the Write Cache function is disabled. For details for this function, refer to section 11.13, "Delayed Write Function (Vendor Specific)" on page 95. Output Parameters To The Device Feature This is the destination code for this command. 07H is the Enable Delayed Write function 87H is the Disable Delayed Write function Travelstar 32GH/30GT/20GN hard disk drive specifications 108

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13.2 Enable/Disable Delayed Write (FAh: vendor specific)
see below
Status
1 1 1 1 1 0 1 0
Command
– – – – – – – –
Device/Head
1 – 1 D – – – –
Device/Head
– – – – – – – –
Cylinder High
– – – – – – – –
Cylinder High
– – – – – – – –
Cylinder Low
– – – – – – – –
Cylinder Low
– – – – – – – –
Sector Number
– – – – – – – –
Sector Number
– – – – – – – –
Sector Count
– – – – – – – –
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
0
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 72. Enable/Disable Delayed Write command (FAh)
The Enable/Disable Delayed Write command sets if the Delayed Write function is enabled or disabled.
Delayed Write function is enabled or disabled according to the feature register's value.
Even if the Delayed Write function is enabled by this command, Delayed Write does not work when the
Write Cache function is disabled.
For details for this function, refer to section 11.13, "Delayed Write Function (Vendor Specific)" on page 95.
Output Parameters To The Device
Feature
This is the destination code for this command.
07H
is the Enable Delayed Write function
87H
is the Disable Delayed Write function
Travelstar 32GH/30GT/20GN hard disk drive specifications
108