Troubleshooting

Troubleshooting & Diagnostics

Diagnostic Information

Table 14. Disk Module Field Pointer Bytes

 

 

 

 

 

Bit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Byte

7

6

5

4

 

3

 

2

1

0

 

 

 

 

 

 

 

 

 

 

 

15

SKSV

C/D

Rsvd

Rsvd

 

BPV

 

 

Bit Pointer

 

 

 

 

 

 

 

 

 

 

 

16-17

 

 

Field Pointer (MSB=16; LSB=17)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A command data C/D bit of one indicates that the illegal parameter is in the command descriptor block. A C/D bit of zero indicates that the illegal parameter is in the data parameters sent by the initiator during the DATA OUT phase.

A BPV (Bit Pointer Valid) 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 the bit of the byte designated by the field pointer that is in error. When a multiple-bit fields in error, the Bit Pointer field will point to the most significant bit of the field.

The Field Pointer field indicates the byte of the command descriptor block or of the parameter data that was in error. Bytes are numbered starting from zero, as shown in the tables describing the commands and parameters. When a multiple-byte field is in error, the pointer will point to the most significant byte of the field.

If a sense key is RECOVERED ERROR (1h), HARDWARE ERROR (4h), or MEDIUM ERROR (3h), and if the SKSV bit is one, the Sense Key Specific field is defined as shown in Table 12. These fields identify the actual number of retries used in attempting to recover from the error condition.

Table 15. Disk Module Actual Retry Count Bytes

 

 

 

 

 

Bit

 

 

 

 

 

 

 

 

 

 

 

 

 

Byte

7

6

5

4

 

3

2

1

0

 

 

 

 

 

 

 

 

 

 

15

SKSV

 

 

 

 

Reserved

 

 

 

 

 

 

 

 

 

16-17

 

 

Actual Retry Count (MSB=16; LSB=17)

 

 

 

 

 

 

 

 

 

 

 

 

The Actual Retry Count field returns implementation-specific information on the actual number of retries used in attempting to recover an error or exception condition. Not all drives implement reporting actual retry counts in bytes 15, 16, and 17. See specific drive Product Manual Volume 1.

If the Sense Key is NOT READY and the SKSV bit is one, the Sense Key Specific field will be defined as shown in Table 13. These fields are only defined for the FORMAT UNIT command with the Immed bit set to one.

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