Read Verify Sectors (40H/41H) - Hitachi T7K250 - Deskstar - Hard Drive Specifications

12.28 Read Verify Sectors (40h/41h)

Table 103: Read Verify Sectors (40h/41h)
Command Block Output Registers
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
Error Register
7 6 5
CRC UNC 0
0 V 0
The Read Verify Sectors 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 will be terminated at the failing sector.
Output parameters to the device
Sector Count
Sector Number
Cylinder High/Low
H
R
Input parameters from the device
Sector Count
Sector Number
Cylinder High/Low
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
1 L 1 D H H H H
0 0 1 0 0 0 0 R
4 3 2 1
IDN 0 ABT T0N AMN
V 0 V 0
This is the number of continuous sectors to be verified. If zero is specified, 256 sectors
will be verified.
This is the sector number of the first sector to be transferred. (L = 0)
In LBA mode this register contains the LBA bits 0–7. (L = 1)
This is the cylinder number of the first sector to be transferred. (L = 0)
In LBA mode this register contains the LBA bits 8–15 (Low) and bits 16–23 (High).
(L = 1)
This is the head number of the first sector to be transferred. (L = 0)
In LBA mode this register contains the LBA bits 24–27. (L = 1)
This is the retry bit. this bit is ignored.
This is the number of requested sectors not verified. This number will be zero unless an
unrecoverable error occurs.
This is the sector number of the last transferred sector. (L = 0)
In LBA mode this register contains the current LBA bits 0–7. (L = 1)
This is the cylinder number of the last transferred sector. (L = 0)
Deskstar T7K250 Hard Disk Drive Specification
Command Block Input Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
0 7 6 5
BSY RDY DF DSC DRQ
V 0 V 0
173
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
- - - - H H H H
see below
Status Register
4 3 2 1
COR IDX
V - 0 -
0
ERR
V