Dell PowerVault TL2000 User Manual download pdf (Page 91)

Response Code:

A value of 70h indicates a current error the report is associated with the most recently received

command. Response code value 71h (deferred errors) not implemented. No other values are

returned.

Segment Number:

This byte contains the number of the current segment descriptor if the Request Sense command is

the response to a Copy, Compare or Copy and Verify command. It is always zero.

Filemark:

This bit is only used in sequential access devices. It is always set to zero.

EOM: The End Of Medium bit is for sequential-access and printer devices. This bit is always set to zero.

ILI: An Incorrect Length Indicator indicates that the requested block length did not match the logical of

the data on the medium. This bit is always set to zero.

Sense Key, ASC, ASCQ:

Sense Key, Additional Sense Code and Additional Sense Code Qualifier provide a hierarchy of

information. The sense key provides generic categories in which error and exception conditions

may be reported. Additional sense code provide further detail describing the sense code.

Additional sense code qualifiers add further detail to the additional sense code. These bytes show

detailed information about the error and exception conditions. See Chapter 7, “Sense Keys, ASC,

and ASCQ,” on page 7-1.

Information:

The contents of the information field is device-type or command specific. These bytes are always

zero.

Additional Sense Length:

This field specifies the number of additional sense bytes to follow. If the allocation length of the

command descriptor block is too small to transfer all of the additional sense bytes, the additional

sense is not adjusted to reflect the truncation.

SKSV: When the Sense-Key Specific Valid bit is set to zero the data in the Sense Key Specific field

(Bytes 15, 16, and 17) do not contain valid data. When the SKSV bit is set to one bytes 15,16 and

17 contain additional information regarding the error condition.

C/D: A command data (C/D) bit of one indicates that the illegal parameter is in the CDB. A C/D bit of

zero indicates that the illegal condition is in the data parameters send by the host.

BPV: A bit pointer valid (BPV) bit of zero indicates that the value in the Bit Pointer field is not valid. A

BPV bit of one indicates that the Bit Pointer field specifies which bit of the byte specified in the

Field Pointer field is in error.

Field Pointer:

The Field Pointer field indicates which byte of the cdb or parameter data was in error. Bytes are

numbered starting from zero, as shown in the tables describing the commands and parameters.

Possible Sense Keys

Sense Key Name Description

0h NO SENSE Indicates that there is no specific sense key information to be reported.

1h RECOVERED ERROR Indicates that the last command completed successfully with some

recovery action performed by the device server.

2h NOT READY Indicates that the logical unit addressed cannot be accessed. Operator

intervention may be required to correct this condition.

4h HARDWARE ERROR Indicates that the device server detected a non-recoverable hardware

failure (for example, controller failure, device failure, parity error, etc.) while

performing the command or during a self test.

Chapter 3. Supported SCSI Commands 3-77

Dell PowerVault TL2000 User Manual Page 91

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Dell PowerVault TL2000 User Manual Page 91

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