15.38
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–VVV000V0V000
ERRIDXCORDRQDSCDFRDYBSYAMNT0NABT0IDN0UNCCRC
0123456701234567
Status RegisterError Register
Figure 138. 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 and the
ECC bytes are transferred 8 bits at a time. The number of ECC bytes is 4 or 40 depending upon the
setting of the Set Feature option. The default number after power-on is 4 bytes.
Output parameters to the device
Sector Count
This parameter represents the number of continuous sectors to be transferred.
The Sector Count must be set to one.
Sector Number
This parameter represents 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
This parameter represents 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
This parameter represents the head number of the sector to be transferred.
(L=0)
In LBA mode, this register contains LBA bits 24–27. (L=1)
Deskstar 60 GXP Hard disk drive specification
183
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