Справочник Пользователя для Hitachi 100GB 7200 RPM HTE721010G9SA00

Travelstar E7K100 (SATA) Hard Disk Drive Specification

113

 

The Read Long command reads the designated one sector of data and the ECC bytes from the disk media. It then 
transfers the data and ECC bytes from the device to the host.

After 512 bytes of data have been transferred, the device will keep setting DRQ = 1 to indicate that the device is 
ready to transfer the ECC bytes to the host.  The number of ECC bytes are 4 or 52 according to the setting of Set 
Feature option. The default setting is 4 bytes of ECC data.

The command makes a single attempt to read the data and does not check the data using ECC. Whatever is read is 
returned to the host.

This indicates the number of continuous sectors to be transferred. The Sector Count must 
be set to one.

This indicates the sector number of the sector to be transferred. (L = 0) 

In LBA mode, this register contains LBA bits 0–7. (L = 1)

This indicates the cylinder number of the sector to be transferred. (L = 0) 

In LBA mode, this register contains LBA bits 8–15 (Low), 16–23 (High). (L = 1)

This indicates the head number of the sector to be transferred. (L = 0) 

In LBA mode, this register contains LBA bits 24–27. (L = 1)

This indicates the retry bit; this bit is ignored.

Sector Count 

This indicates the number of requested sectors not transferred

Register

7 6 5 4 3 2 1 0

Register

7 6 5 4 3 2 1 0

Data

- - - - - - - -

Data

- - - - - - - -

Feature

- - - - - - - -

Error

see below

Sector Count

0 0 0 0 0 0 0 1

Sector Count

- - - - - - - V

LBA Low

V V V V V V V V

LBA Low

V V V V V V V V

LBA Mid

V V V V V V V V

LBA Mid

V V V V V V V V

LBA High

V V V V V V V V

LBA High

V V V V V V V V

Device

- L - - H H H H

Device

- - - - H H H H 

Command

0 0 1 0 0 0 1 R

Status

see below

7

6

5

4

3

2

1

0

7

6

5

4

3

2

1

0

CRC

UNC

0

IDN

0

ABT

T0N

AMN

BSY RDY

DF

DSC

DRQ

COR IDX

ERR

0

0

0

V

0

V

0

V

0

V

0

V

-

0

-

V