Chapter 5

ATAPI Interface

The following table describes the REQUEST SENSE layout.

Byte

Description

Value

Meaning

 

 

 

 

0

Valid, Error Code

70h,71h

80h = Information Field Valid

 

 

 

+ 70h = Current Errors

 

 

 

or 71h = Deferred Errors

 

 

 

 

1

Reserved (Segment Number)

00

 

 

 

 

2

Filemark, EOM, ILI, Sense Key

NN

80h = Filemark

 

 

 

+ 40h = EOM

 

 

 

+ 20h = ILI

 

 

 

+ Sense Key

 

 

 

 

3-6

Information

NNNNNNNN

Transfer Residue or

 

 

 

Unwritten Blocks + Filemarks

 

 

 

 

7

Additional Sense Length

0Ah

10 bytes following

 

 

 

 

8-11

Command Specific Information

00h

Not Supported

 

 

 

 

12

Additional Sense Code (ASC)

NN

 

 

 

 

 

13

Additional Sense Code

NN

 

 

Qualifier (ASCQ)

 

 

 

 

 

 

14

Field Replaceable Unit Code

00h

Not Supported

 

 

 

 

15

SKSV + Sense Key Specific

00h

Not Supported

 

 

 

 

16,17

Sense Key Specific

0000h

Not Supported

 

 

 

 

18,19

Pad

0000h

Pad to 4-byte boundary

 

 

 

 

Page 56

STT8000A Product Manual

Page 64
Image 64
Seagate STT8000A manual Following table describes the Request Sense layout