Hitachi 100GB 7200 RPM HTE721010G9SA00 Benutzerhandbuch

Travelstar E7K100 (Serial ATA) Hard Disk Drive Specification

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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 5.16.

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.

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

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.

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.

Error Register

7

6

5

4

3

2

1

0

BSY

DRDY

DF

DSC

DRQ

CORR

IDX

ERR