Hitachi IC25N040ATCS04-0 - Travelstar 40GN 40GB UDMA/100 4200RPM 2MB 2.5" IDE Hard Drive Specifications page 201

H
R
Input parameters from the device
Sector Count
Sector NumberThis indicates the sector number of the sector to be transferred. (L = 0)
Cylinder High/Low
H
The drive internally uses 40 bytes of ECC on all data read or writes. The 4-byte mode of operation is
provided via an emulation technique. As a consequence of this emulation it is recommended that 40 byte
ECC mode is used for all tests to confirm the operation of the ECC hardware of the drive. Unexpected
results may occur if such testing is performed using 4-byte mode.
This indicates the head number of the sector to be transferred. (L = 0)
In LBA mode this register contains the LBA bits 24–27. (L = 1)
The retry bit, but this bit is ignored.
This indicates the number of requested sectors not transferred.
In LBA mode this register contains the current LBA bits 0–7. (L = 1)
This indicates the cylinder number of the sector to be transferred. (L = 0)
In LBA mode this register contains current the LBA bits 8–15 (Low) and bits
16–23 (High). (L = 1)
This indicates the head number of the sector to be transferred. (L = 0)
In LBA mode this register contains current the LBA bits 24–27. (L = 1)
Hitachi Travelstar 60GH & 40GN hard disk drive specifications
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