IBM DTCA-24090 Hard Drive Specifications - Page 171
The file internally uses 28 bytes of ECC on all data read or writes.
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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 28 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 28 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. Command Descriptions 163