IBM DBCA-204860 - Travelstar 4.8 GB Hard Drive Specifications page 174

Input Parameters From The Device
Sector Count The number of requested sectors not transferred.
Sector Number The sector number of the sector to be transferred. ( L = 0 )
In LBA mode, this register contains current LBA bits 0 - 7. ( L = 1 )
Cylinder High/Low The cylinder number of the sector to be transferred. ( L = 0 )
In LBA mode, this register contains current LBA bits 8 - 15 (Low), 16 - 23 (High).
( L = 1 )
H The head number of the sector to be transferred. ( L = 0 )
In LBA mode, this register contains current LBA bits 24 - 27. ( L = 1 )
The file internally uses 34 bytes of ECC on all data read or writes. The 4 byte mode of operation is pro-
vided via an emulation technique. As a consequence of this emulation it is recommended that 34 byte ECC
mode is used for all tests to confirm the operation of the files ECC hardware. Unexpected results may occur
if such testing is performed using 4 byte mode.
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O E M Specifications of DBCA-2xxxxx 2.5 inch H D D