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Write Multiple (C5h)
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
V
V
V
V
V
V
V
V
Sector Count
V
V
V
V
V
V
V
V
Sector Number
V
V
V
V
V
V
V
V
Sector Number
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
Cylinder High
V
V
V
V
V
V
V
V
Cylinder High
V
V
V
V
V
V
V
V
Device/Head
1
L
1
D
H
H
H
H
Device/Head
-
-
-
-
H
H
H
H
Command
1
1
0
0
0
1
0
1
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
V
0
V
0
0
0
V
0
V
-
0
-
V
Table 260 Write Multiple Command (C5h)
The Write Multiple command transfers one or more sectors from the host to the device, and then the data is written
to the disk media.
Command execution is identical to the Write Sector(s) command except that an interrupt is generated for each
block (as defined by the Set Multiple command) instead of for each sector. The sectors are transferred through the
Data Register 16 bits at a time.
Output Parameters To The Device
Sector Count
The number of continuous sectors to be transferred. If zero is specified, then 256 sectors
will be transferred.
Sector Number
The sector number of the first 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 first 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 first sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 24 - 27. (L=1)
Input Parameters From The Device
Sector Count
The number of requested sectors not transferred. This will be zero, unless an
unrecoverable error occurs.
Sector Number
The sector number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 0 - 7. (L=1)
Cylinder High/Low
The cylinder number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 8 - 15 (Low), 16 - 23 (High). (L=1)
H
The head number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 24 - 27. (L=1)
313
Western Digital Ultrastar DC HC310 SATA Product Manual