12.38
Write Long (32h/33h)
see below
Status
0 0 1 1 0 0 1 R
Command
- - - - H H H H
Device/Head
1 L 1 D H H H H
Device/Head
V V V V V V V V
Cylinder High
V V V V V V V V
Cylinder High
V V V V V V V V
Cylinder Low
V V V V V V V V
Cylinder Low
V V V V V V V V
Sector Number
V V V V V V V V
Sector Number
- - - - - - - V
Sector Count
0 0 0 0 0 0 0 1
Sector Count
see below
Error
- - - - - - - -
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
–
V
V
V
0
0
0
V
0
V
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 144. Write Long Command (32h/33h)
The Write Long command transfers the data and the ECC bytes of the designated sector from the host to
the device. The data and the ECC bytes are then written to the disk media.
After 512 bytes of data have been transferred, the device will keep setting DRQ=1 to indicate that the
device is ready to receive the ECC bytes from the host. The data is transferred 16 bits at a time; the ECC
bytes are transferred 8 bits at a time. The number of ECC bytes is 4 or 40 according to the setting of the
Set Feature option. The default number after power-on is 4 bytes.
Output parameters to the device
Sector Count
The number of continuous sectors to be transferred. The Sector Count must be
set to one.
Sector Number
The sector number of the sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 0 - 7. (L=1)
Cylinder High/Low The cylinder number of the sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 8 - 15 (Low), 16 - 23 (High). (L=1)
H
The head number of the sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 24 - 27. (L=1)
R
The retry bit. If set to one, then retries are disabled.
Deskstar 40GV & 75GXP hard disk drive specifications
187
Содержание DTLA-305040 - Deskstar 41.1 GB Hard Drive
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