Read Verify Sector(S) (42H) - Hitachi T7K250 - Deskstar - Hard Drive Specifications

12.29 Read Verify Sector(s) (42h)

Table 104: Read Verify Sector(s) command (42h)
Command Block Output Registers
Register
Data Low
Data High
Current
Feature
Previous
Current
Sector
Count
Previous
Current
Sector
Number
Previous
Current
Cylinder
Low
Previous
Cylinder Current
Previous
High
Device/Head
Command
Error Register
7 6 5
CRC UNC 0
0 0 0
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
Sector Count Previous
Sector Number Current
Sector Number Previous
Cylinder Low Current
Cylinder Low Previous
Cylinder High Current
Cylinder High Previous
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
V V V V V V V V
V V V V V V V V
V V V V V V V V
V V V V V V V V
V V V V V V V V
V V V V V V V V
V V V V V V V V
V V V V V V V V
1 1 1 D - - - -
0 0 1 0 0 0 1 0
4 3 2 1
IDN 0 ABT T0N AMN
V 0 V 0
The number of continuous sectors to be verified low order, bits (7:0).
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.
LBA (7:0)
LBA (31:24)
LBA (15:8)
LBA (39:32)
LBA (23:16)
LBA (47:40)
Deskstar T7K250 Hard Disk Drive Specification
Command Block Input Registers
Register
Data Low
Data High
Error
HOB=0
Sector
Count
HOB=1
HOB=0
Sector
Number
HOB=1
HOB=0
Cylinder
Low
HOB=1
Cylinder HOB=0
HOB=1
High
Device/Head
Status
0 7 6 5
BSY RDY DF DSC DRQ
V 0 V 0
175
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
V V V V V V V V
V V V V V V V V
V V V V V V V V
V V V V V V V V
V V V V V V V V
V V V V V V V V
- - - - - - - -
See below ...
Status Register
4 3 2 1
COR IDX
V - 0 -
0
ERR
V