Hitachi travelstar hds723020bla642 用户手册

7K200 SATA OEM Specification 

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R 

Retry. Original meaning is already obsolete, there is no difference between 0 and 1. (Using 0 is 
recommended for future compatibility.) 

B 

Option Bit. Indicates that the Option Bit of the Sector Count Register should be specified. (This bit is used by 
Set Max ADDRESS command) 

V 

Valid. Indicates that the bit is part of an output parameter and should be specified. 

x 

Indicates that the hex character is not used. 

- 

Indicates that the bit is not used. 

Input Registers 
0 

Indicates that the bit is always set to 0. 

1 

Indicates that the bit is always set to 1. 

H 

Head number. Indicates that the head number part of the Device Register is an input parameter and will be 
set by the device. 

V 

Valid. Indicates that the bit is part of an input parameter and will be set to 0 or 1 by the device. 

N 

Not recommendable condition for start up. Indicates that the condition of device is not recommendable for 
start up. 

- 

Indicates that the bit is not part of an input parameter. 

The command descriptions show the contents of the Status and Error Registers after the device has 

completed processing the command.