Features Register; Lba High Register; Lba Low Register; Lba Mid Register - Hitachi 7K100 - Travelstar - Hard Drive Specifications

10.8 Features Register

This register is command specific. This register is used with the Set Features command, the S.M.A.R.T. Function
Set command, and the Format Unit command.

10.9 LBA High Register

This register contains Bits 16-23. At the end of the command this register is updated to reflect the current
LBA Bits 16-23.
When 48-bit addressing commands are used, the "most recently written" content contains LBA Bits 16-23 and the
"previous content" contains Bits 40-47. The 48-bit Address feature set is described in Section 11.15 "48-bit
Address Feature Set," on page 85.

10.10 LBA Low Register

This register contains Bits 0-7. At the end of the command, this register is updated to reflect the current
LBA Bits 0-7.
When 48-bit commands are used, the "most recently written" content contains LBA Bits 0-7, and the "previous
content" contains Bits 24-31.

10.11 LBA Mid Register

This register contains Bits 8-15. At the end of the command, this register is updated to reflect the current
LBA Bits 8-15.
When 48-bit addressing commands are used, the "most recently written" content contains LBA Bits 8-15 and the
"previous content" contains Bits 32-39.

10.12 Sector Count Register

This register contains the number of sectors of data requested to be transferred on a read or write operation between
the host and the device. If the value in the register is set to 0, a count of 256 sectors (in 28-bit addressing) or 65,536
sectors (in 48-bit addressing) is specified.
If the register is zero at command completion, the command was successful. If not successfully completed, the reg-
ister contains the number of sectors which need to be transferred in order to complete the request.
The contents of the register are defined otherwise on some commands. These definitions are given in the command
descriptions.
Travelstar 7K100 Hard Disk Drive Specification
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