Sector Number Register; Status Register - Hitachi T7K250 - Deskstar - Hard Drive Specifications

9.13 Sector Number Register

This register contains the starting sector number for any disk data access for the subsequent command. The sector
number is from one to the maximum number of sectors per track.
In LBA mode, this register contains Bits 0–7. At the end of the command this register is updated to reflect the cur-
rent LBA Bits 0–7.
When 48-bit commands are used, the "most recently written" content contains LBA Bits 0-7 and the "previous con-
tent" contains Bits 24-31.

9.14 Status Register

Table 52: Status Register
7 6
BSY DRDY
This register contains the device status. The contents of this register are updated whenever an error occurs and at
the completion of each command.
If the host reads this register when an interrupt is pending, it is considered to be the interrupt acknowledge. Any
pending interrupt is cleared whenever this register is read.
If BSY=1, no other bits in the register are valid.
5 4 3
DSC/
DF DRQ
SERV
Deskstar T7K250 Hard Disk Drive Specification
2 1 0
CORR IDX ERR
76