Advanced Diagnostics SCSI Errors

SCSI POST error (QEET) codes 

   The SCSI error codes for Advance Diagnostics are different from the SCSI POST error (QEET) codes provided in the HMM, Form #S52G-9971 - 01.  If SCSI errors occur during POST, the Advanced Diagnostics should be run prior to any parts being replaced.

   When the SCSI Fixed Disk Diagnostic Test detects a failure in a hard file, a 12 character error code is generated which consists of the 8 digit SCSI ERROR CODE, plus the 4 digit ERROR RETURN CODE.

   Error code 0210401H 9231 is an error code which was provided by the Advanced Diagnostics during an actual service incident. This error is decoded using the following format:

    0210401H 9231     (actual error code)
    0210PLSC 9XYY     (decoding key)

   0210  - means non-removal fixed disk media (hard file).
   P     - PUN (Physical unit number, ie. SCSI ID=4)
   L     - LUN (Logical unit number, 0 on fixed disks)
   S     - micro channel slot of the SCSI adapter
   C     - capacity code of the specific fixed disk being tested

   9     --> UNIT REFERENCE CODE     (Important, See note below)
   X     --> SENSE KEY                   (Refer to Chart 1, below)
   Y |-----> ADDITIONAL SENSE CODE       (Refer to Chart 2, below
   Y |                                    00 - 5D are valid codes)

   The information contained in the first 8 characters is not error specific and only points to the device under test.  The RETURN CODE is more specific to the failure and may be decoded by first referring to the SENSE KEY in Chart 1 and then referring to the ADDITIONAL SENSE CODES from chart 2 .  Some of the SENSE KEY and ADDITIONAL SENSE CODES represent a probable software problem.  Operating System software has the capability of receiving this information and using it to provide detailed error information to the user, or to execute error recovery processes.  The use of this capability varies by design from operating system to operating system.

Note:
   If the Unit Reference Code is other than a '9', the following SENSE KEY and ADDITIONAL SENSE CODES (Charts 1 and 2) have DIFFERENT meanings and SHOULD NOT be used.



CHART 1 SENSE KEY DESCRIPTION
0
NO SENSE KEY No sense key information is available
1
RECOVERED ERROR The last command completed successfully with recovery action performed by the device.
2
NOT READY The logical unit addressed cannot be selected.
3
MEDIA ERROR The command terminated with a non-recoverable error condition caused by either an error in the recorded data or a flaw in the media (disk).
4
HARDWARE ERROR The device detected a non-recoverable hardware error while performing a command or during a diagnostic test.
5
ILLEGAL REQUEST There was an illegal parameter in the command descriptor block or additional parameter supplied as data. This is a probable software error.
6
UNIT ATTENTION The device has been RESET by either a power-on sequence, a bus DEVICE RESET message, a HARD RESET, removable media was removed/inserted, or a Mode Select command was issued.
7 A
N/A (Unused)
B
ABORTED COMMAND The device aborted the command.
C-D
N/A (Unused)
E
MISCOMPARE Indicates that the source data did not match the data read from the media on a Write Verify or Verify command.
F
N/A (Unused)


CHART 2 ADDITIONAL SENSE CODE DESCRIPTION
 00 
No Additonal Sense 
Information Is Available
0
01
No Index Or Sector
Was Found.
Low-level format the drive. If the diagnostics then run error-free the drive is serviceable.
02
Seek Incomplete. The time required to physically move the head/arm assembly or switch heads exceeds the specified limits.Probably a hardware failure.
03
Write Fault. A write fault error occurs when a track position or write circuit fault is detected during a write operation.This is not always a hardware failure.  A physical jolt to the drive during a write operation could cause this situation.  An isolated occurrence does not indicate a hardware failure.
04
Drive Not Ready Occurs when the spindle motorspeed is out of specifications or if the device requires a motor start command and the command was not issued.  Do a Power-off-on and retest the drive.
09
Track Following Error Occurs when the actuator position cannot be maintained over a given track.  Probably a hardware failure.
0C
Write Error A failure occurred during write operation (probably with Verify on) and auto-reallocation of the sector failed or is not supported on this type drive. A low-level format should be done or the sector re-assigned.  If the diagnostics then run error-free the drive is serviceable.
10
ID CRC A read error was detected in the IDfield of the sector during a read or write operation.  A low-level format should be done.  If the diagnostics then run error free the fixed disk is serviceable.
11
Unrecoverable Read Error Occurred in the data field of the sector that could not be corrected.  The sector should be re-written, reassigned, or a low-level format done. If the diagnostics then run error-free, the drive is serviceable.
14
No Record Found Occurs when the SCSI device cannot find the requested record.  Low-level format the drive then retest.  If no errors occur the drive is serviceable.
15
Seek Positioning Error Occurs when the positioningof the head/arm assembly to a new location failed.  Probably a hardware failure.
16
Data Synchronization 
Mark Error
Occurs when the sync byte at the data field cannot be detected.  A low-level format should be done.  If diagnostics then run error-free the fixed diskis serviceable.
17
Recovered Read Data
without ECC
Occurs when the ECC check bytes calculated from the read data during the first read operation doesn't match the ECC check bytes appended to the data field and did match on a subsequent read operation.  This can result from minor media defect. Rewrite, re-assign the sector, or low level format the drive and re-run diagnostics.  If no error is detected the fixed disk is serviceable.
18
Recovered Read 
Data With ECC.
Occurs when the ECC check bytes calculated from the read data during the first read doesn't match the ECC check bytes appended to the data field and had ECC correction applied on a subsequent read.  Possibly a minor media defect. Rewrite re-assign the sector or low level format the drive and re-run diagnostics. If no error is detected the fixed disk is serviceable.
19
Defect List Error Occurs when a data erroris detected while reading the manufacturing defect list or while readingor writing the grown defect list.  Low-level format and ignoring the grown defect list and retest the drive.  If no errors occur the driveis serviceable.
1A
Parameter List
Length Eerror
Occurs when the command operation code received by the device is invalid. Probable software problem.
1B
Synchronous Data
Transfer Error
An error during data transmission occurred.  Check cable connections cable termination and for excessive cable length and retest.
ID
Compare Error Occurs when the data read from the media doesn't match the data written to the media on a Write with Verify command.  Probably a hardware problem.
20
Invalid Command
Operation Code
Occurs when the command operation code received by the device is not supported.
21
Illegal Logical 
Block Address
Occurs when the logical block address requested is outside the range supported by the device.  Probable software problem.
24
Illegal Field
In The CDB.
Occurs when the device detects unexpected values in any field of the CDB (Command Descriptor Block) Probable software problem.
25
Illegal LUN. Occurs when the LUN field in the CDB is not supported.  Probable software problem.
26
Illegal Field In The 
Parameters List
Occurs when the device detects values other than expected in any field of the parameter list.  Probable software problem.
28
Removeable Medium
Changed
(Not applicable for fixed disk drives.)
29
Power-On Reset
     or 
Bus Device Reset
A power-on reset or a bus device reset sense code indicates that the device (drive) was reset.  A reset may have been issued by software or may be defective hardware.
2A
Mode Select
Parameters Changed
Not a hardware failure. This could be due to either software or diagnostic code problems.
31
Media Format
Corrupted
The format of the media appears to be corrupted or was interrupted (power down, reset, etc.) prior to completion of a Format Unit command.  The Format Unit command should be re-issued and must complete successfully for this error condition to be removed.
32
No Defect Spare
Location Available
Indicates that the Reassign Block Command cannot successfully complete because allavailable spare sectors have been used. A Low-level format should be done ignoring the grown defect list and the drive retested.  If no errors occur the drive is serviceable.
3F
Operating Condition 
On The Device Has 
Been Changed
This is probably a software error.
40
Component Failure The drive self-test diagnostics detected a failure (Hardware) in the device.
43
Message Reject Error Occurs when an inappropriate or unexpected Message Reject is received from the SCSI Adapter/A or the SCSI Adapter/A rejects a message twice.
44
Internal Controller Error Occurs when an internal microprocessor detects incorrect status or receives an illegal request from the device electronics.  This is a hardware failure.
45
Select/Re-Select Failed Occurs when the SCSI Adapter fails to respond to a re-selection within 250ms after the device gains bus arbitration.  The re-selection is attempted a second time before setting select/re-select failed status.
47
SCSI Interface 
Parity Error
Occurs when the device detects incorrect parity on the SCSI data bus (CABLE). Check cable connections cable termination and cable length (maximum 6 meters or approx.20 feet).
48
Initiator Detected Error Occurs when the SCSI Adapter/A detects an error, sends a message to retry, detects the error again and sends the retry message a second time. Probably a hardware problem.
49
Inappropriate/
Illegal Message
Occurs when the SCSI Adapter/A sends a message that either is not supported or is not in a logical sequence.  Probably a software error.
4C
Logical Unit Failed 
Self Configuration
Probably a hardware failure in the device being tested.
4E
Overlapped Commands 
Attempted.
Probably a software error.
5D
Predictive Failure 
Analysis Threshold
Reached
When a predetermined number of errors is reached this error message will promptt he user to take action to prevent loss of data (back-up the data and have fixed disk serviced/replaced as appropriate.)

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