Deskstar 7K250 Hard Disk Drive Specification
201
12.45 Write Buffer (E8h)
Table 130: Write Buffer (E8h)
The Write Buffer command transfers a sector of data from the host to the sector buffer of the device. The sectors of
data are transferred through the Data Register 16 bits at a time.
The Read Buffer and Write Buffer commands are synchronized such that sequential Write Buffer and Read Buffer
commands access the same 512 byte within the buffer.
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
- - - - - - - -
Error
see below
Sector Count
- - - - - - - -
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 0 0 0
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
V
0
-
-
0
-
V
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