Features Register; Sector Count Register; Sector Number Register; Status Register - IBM DYLA-28100 - Travelstar 8.1 GB Hard Drive Specifications

Bit Definitions
ICRCE (CRC) Interface C R C Error.
during a Ultra-DMA transfer.
UNC Uncorrectable Data Error. U N C = 1 indicates an uncorrectable data error has been
encountered.
IDNF (IDN) ID Not Found. I D N = 1 indicates the requested sector's ID field could not be found.
ABRT (ABT) Aborted Command.
due to a device status error or an invalid parameter in an output register.
TK0NF (T0N) Track 0 Not Found. T 0 N = 1 indicates track 0 was not found during a Recalibrate
command.
AMNF (AMN) Address Mark Not Found. A M N = 1 indicates the data address mark has not been
found after finding the correct ID field for the requested sector.

9.10 Features Register

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

9.11 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 is specified.
If the register is zero at command completion, the command was successful. If not successfully completed,
the register 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.

9.12 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 current LBA Bits 0-7.

9.13 Status Register

7
B S Y
Figure 43. Status Register
C R C = 1 indicates a C R C error has occurred on the data bus
A B T = 1 indicates the requested command has been aborted
S t a t u s R e g i s t e r
6 5 4
D R D Y D F D S C D R Q
3 2 1 0
C O R R I D X E R R
65
Registers