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Deskstar 7K400 Hard Disk Drive Specification
180
12.31 Read Verify Sector(s) (42h)
Table 131: Read Verify Sector(s) command (42h)
The Read Verify Sector(s) Ext command verifies one or more sectors on the device. No data is transferred to the
host.
The difference between the Read Sector(s) command and the Read Verify Sector(s) command is whether data is
transferred to the host or not.
If an uncorrectable error occurs, the Read Verify Sector(s) Ext will be terminated at the failing sector.
Output parameters to the device
Sector Count Current
The number of continuous sectors to be verified low order, bits (7:0).
Sector Count Previous
The number of continuous sectors to be verified high order, bits (15:8). If zero is
specified in the Sector Count register, 65,536 sectors will be transferred.
Sector Number Current
LBA (7:0)
Sector Number Previous
LBA (31:24)
Cylinder Low Current
LBA (15:8)
Cylinder Low Previous
LBA (39:32)
Cylinder High Current
LBA (23:16)
Cylinder High Previous
LBA (47:40)
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 Low
- - - - - - - -
Data Low
- - - - - - - -
Data High
- - - - - - - -
Data High
- - - - - - - -
Feature
Current
- - - - - - - -
Error
see below
Previous
- - - - - - - -
Sector
Count
Current
V V V V V V V V
Sector
Count
HOB=0
- - - - - - - -
Previous
V V V V V V V V
HOB=1
- - - - - - - -
Sector
Number
Current
V V V V V V V V
Sector
Number
HOB=0
V V V V V V V V
Previous
V V V V V V V V
HOB=1
V V V V V V V V
Cylinder
Low
Current
V V V V V V V V
Cylinder
Low
HOB=0
V V V V V V V V
Previous
V V V V V V V V
HOB=1
V V V V V V V V
Cylinder
High
Current
V V V V V V V V
Cylinder
High
HOB=0
V V V V V V V V
Previous
V V V V V V V V
HOB=1
V V V V V V V V
Device/Head
1 1 1 D - - - -
Device/Head
- - - - - - - -
Command
0 0 1 0 0 0 1 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
V
0
V
0
0
0
V
0
V
-
0
-
V
Summary of Contents for Deskstar 7K400
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