IBM DARA-206000 Hard Drive Specifications - Page 118

Enable/Disable Delayed Write, FAh: Vendor Specific

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12.2 Enable/Disable Delayed Write (FAh: Vendor Specific) Command Block Output Registers Register 76543210 Data Feature VVVVVVVV Sector Count Sector Number Cylinder Low Cylinder High Device/Head 1 1D Command 11111010 Command Block Input Registers Register 76543210 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 76543210 BSY RDY DF DSC DRQ COR IDX ERR 000 0 V Figure 72. Enable/Disable Delayed Write Command (FAh) The Enable/Disable Delayed Write command sets if Delayed Write function is enabled or disabled according to the feature register value. Even if Delayed Write function is enabled by this command, Delayed Write does not work when Write Cache function is disabled. For details for this function, refer to 10.12, "Delayed Write Function (Vendor Specific)" on page 95. Output Parameters To The Device Feature Destination code for this command. 07H Enable Delayed Write function 87H Disable Delayed Write function 108 OEM Specifications of DARA-2xxxxx 2.5 inch H D D Rev 2.1

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12.2
Enable/Disable Delayed Write
(FAh: Vendor Specific)
Command Block Output Registers
Command Block Input Registers
Register
76543210
Register
76543210
Data
Data
Feature
VVVVVVVV
Error
...See Below...
Sector Count
Sector Count
Sector Number
Sector Number
Cylinder Low
Cylinder Low
Cylinder High
Cylinder High
Device/Head
1
1D
Device/Head
Command
11111010
Status
...See Below...
Error Register
Status Register
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
CRC UNC
0
IDN
0
ABT T0N AMN
BSY RDY DF
DSC DRQ COR IDX ERR
0
0
0
0
0
V
0
0
0
0
0
0
V
Figure 72. Enable/Disable Delayed Write Command (FAh)
The Enable/Disable Delayed Write command sets if Delayed Write function is enabled or disabled according
to the feature register value.
Even if Delayed Write function is enabled by this command, Delayed Write does not work when Write
Cache function is disabled.
For details for this function, refer to 10.12, “Delayed Write Function (Vendor Specific)” on page 95.
Output Parameters To The Device
Feature
Destination code for this command.
07H
Enable Delayed Write function
87H
Disable Delayed Write function
108
OEM Specifications of DARA-2xxxxx 2.5 inch HDD Rev 2.1