IBM DTLA-305040 Hard Drive Specifications - Page 175

Set Multiple C6h

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12.30 Set Multiple (C6h) Command Block Output Registers Register 7 6 5 4 3 2 1 0 Data Feature Sector Count V V V V V V V V Sector Number Cylinder Low Cylinder High Device/Head 1 - 1 D - - - - Command 1 1 0 0 0 1 1 0 Command Block Input Registers Register 7 6 5 4 3 2 1 0 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 7 6 5 4 3 2 10 BSY RDY DF DSC DRQ COR IDX ERR 0 V 0 - - 0 -V Figure 125. Set Multiple Command (C6h) The Set Multiple command enables the device to perform Read and Write Multiple commands and establishes the block size for these commands. The block size is the number of sectors to be transferred for each interrupt. If an invalid block size is specified, an Abort error will be returned to the host and Read Multiple and Write Multiple commands will be disabled. Output parameters to the device Sector Count The block size to be used for Read Multiple and Write Multiple commands. Valid block sizes can be selected from 0, 2, 4, 8 or 16. If 0 is specified, then Read Multiple and Write Multiple commands are disabled. Deskstar 40GV & 75GXP hard disk drive specifications 163

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12.30 Set Multiple (C6h)
see below
Status
1 1 0 0 0 1 1 0
Command
- - - - - - - -
Device/Head
1 - 1 D - - - -
Device/Head
- - - - - - - -
Cylinder High
- - - - - - - -
Cylinder High
- - - - - - - -
Cylinder Low
- - - - - - - -
Cylinder Low
- - - - - - - -
Sector Number
- - - - - - - -
Sector Number
- - - - - - - -
Sector Count
V V V V V V V V
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
–
–
0
V
0
0
0
V
0
0
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 125. Set Multiple Command (C6h)
The Set Multiple command enables the device to perform Read and Write Multiple commands and estab-
lishes the block size for these commands. The block size is the number of sectors to be transferred for
each interrupt.
If an invalid block size is specified, an Abort error will be returned to the host and Read Multiple and Write
Multiple commands will be disabled.
Output parameters to the device
Sector Count
The block size to be used for Read Multiple and Write Multiple commands. Valid
block sizes can be selected from 0, 2, 4, 8 or 16. If 0 is specified, then Read
Multiple and Write Multiple commands are disabled.
Deskstar 40GV & 75GXP hard disk drive specifications
163