IBM IC35L020 - Deskstar 20 GB Hard Drive - Read Verify Sectors (40 H;41 H); Figure 96. Read Verify Sectors Command (40 H;41 H)

15.18 Read Verify Sectors (40h/41h)
see below
Status
0 0 1 0 0 0 0 R
Command
- - - - H H H H
Device/Head
1 L 1 D H H H H
Device/Head
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
Cylinder Low
V V V V V V V V
Cylinder Low
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
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–V0V0V0V0V0V0
ERRIDXCORDRQDSCDFRDYBSYAMNT0NABT0IDN0UNCCRC
0123456701234567
Status RegisterError Register
Figure 96. Read Verify Sectors Command (40h/41h)
The Read Verify Sectors verifies one or more sectors on the device. No data is transferred to the host.
The difference of Read Sectors command and Read Verify Sectors command is whether the 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
The number of continuous sectors to be verified. If zero is specified, then
256 sectors will be verified.
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)
R
The retry bit. If set to one, then retries are disabled.
Deskstar 60 GXP Hard disk drive specification
135