An explanation of the ASC/ASCQ table format is available if you are unfamiliar with these tables. To determine the meaning of the Additional Sense Code (asc) and Additional Sense Code Qualifier (ascq), use the two codes together. You can see full parsing of this sense in the webapp: f1 00 03 02 DD 7E BF 18 00 00 00 00 0C 03 00 00 00 00 00 00 Try again later. | ERESTARTSYS | this indicates an internal error. this content
Return to the SCSI Common Codes & Values page Return to the T10 Home Page Key Code Qualifier From Wikipedia, the free encyclopedia Jump to: navigation, search "KCQ" redirects here. See section Hostcodes driver_byte(hd_status) | From the kernel. A SCSI sense has several top-level attributes that one would care about the most: Sense type, either fixed or descriptor, What command it relates to, current or previous, Sense Key, ASC/ASCQ The ASCII plain text is suitable for FTP transfer to your computer, printing, and local editor inspection. http://blog.disksurvey.org/knowledge-base/scsi-sense/
See the clause describing the REQUEST SENSE command in the SCSI Primary Commands - 4 (SPC-4) draft standard (or later) for more information about sense data. Try later again unless you | | exceeded the maximum transfer size (see above) select | | none close | | none For read/write positive return values indicate as usual You should get the following interpretation for the 0x5 0x25 0x0 field: sense=5 (ILLEGAL REQUEST), ASC=25 ASCQ=0 (LOGICAL UNIT NOT SUPPORTED) ERROR The requested URL could not be retrieved Indicates a SEARCH DATA command has satisfied an equal | | | comparison. | |--------+--------------------------------------------------------------------| | Dh | VOLUME OVERFLOW.
The next part is the ASC and ASCQ these are found in bytes 12 and 13 (13 and 14 if counting from 1). The easiest way to decode a sense buffer is to use a tool, I know of two: sg3_utils provides sg_decode_sense since version 1.31 libscsicmd implements it a web tool is available Example: Interpreting SCSI Sense Codes The following is an example of a SCSI error message that appears in the ESXi log file. 2011-04-04T21:07:30.257Z cpu2:2050)ScsiDeviceIO: 2315: Cmd(0x4124003edb00) 0x12, CmdSN 0x51 to dev Scsi Unit Attention The attention needs to be taken care of and the command that was unfortunate enough to be failed for this can be retried.
SCSI Primary Commands-4 (SPC-4). Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization. The system returned: (22) Invalid argument The remote host or network may be down. anchor It reports the error code and possibly also additional information that helps to locate the source of the problem so the administrator or developer can help resolve the issue.
When multiple recovered errors | | | occur during one command, the choice of which error to report | | | (first, last, most severe, etc.) is device specific. | |--------+--------------------------------------------------------------------| Scsi Check Condition This status indicates that the target is busy. This status or INTERMEDIATE-CONDITION MET is returned whenever the requested operation is satisfied (see the SEARCH DATA and PRE-FETCH commands). See http://www.t10.org/lists/2asc.htm for details.
In this case their return value is -1 and the global variable errno is set to the error number. Indicates that the target detected a non- | | | recoverable hardware failure (for example, controller failure, | | | device failure, parity error, etc.) while performing the command | | Scsi Asc Ascq You will need to reformulate the request or plain avoid it altogether. Scsi Sense Data Sense Key 3 Sense Code 11 Text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply.
Value | Symbol | Description of Driver status ======|================|======================================== 0x00 | DRIVER_OK | No error 0x01 Scsi Error Codes
In a SCSI disk there are two bits AWRE and ARRE that control if a auto-reallocation is done by the disk. Operator intervention may be required to correct this | | | condition. | |--------+--------------------------------------------------------------------| | 3h | MEDIUM ERROR. The normal Linux kernel SCSI stack will ignore this sense and continue along with only reporting it in dmesg. http://wx2me.com/scsi-sense/scsi-sense-error-code-0x52.php Try again later. | ENOMEM | memory required for this request could not be | | allocated.
When the status is CHECK_CONDITION, the sense data in the sense buffer is valid (check especially the additional sense code and additional sense code qualifier). Aborted Command - Data Phase Error write | EIO | the length is too small (smaller than the | | generic header struct). This status is returned when a SIMPLE QUEUE TAG, ORDERED QUEUE TAG, or HEAD OF QUEUE TAG message is received and the command queue is full.
At some cases a retry to read the data may get the data eventually but it doesn’t have a high likelyhood and it incurs a great penalty in time since normally
A Not Ready sense is returned when the device is powering up and not yet ready to really respond to anything serious, such as when an HDD is still spinning up Incapsula incident ID: 275001300257392023-493603789435242529 ⇨SEND US FEEDBACK! See section SCSI sense keys host_byte(hd_status) | From the kernel. Scsi Sense Codes Vmware The first field, H:0x0 D:0x2 P:0x0, is a combination of SCSI Status codes for the three components in your storage environment, the host, the device, and the plug-in.
Indicates that a buffered peripheral device has | | | reached the end-of-partition and data may remain in the buffer | | | that has not been written to the medium. Generated Thu, 27 Oct 2016 13:42:15 GMT by s_wx1126 (squid/3.5.20) The meaning of hd_status can be found in drivers/scsi/scsi.h: This unsigned int is composed out of different parts:lsb | ... | ... | msb =======|===========|===========|============ status | sense key check my blog The second field in a typical SCSI error message provides more information about the error.21.2 Status codes The following status codes from the SCSI device (defined in scsi/scsi.h) are available.
Indicates that the logical unit addressed cannot be | | | accessed. One part that is a bit harder to decode is what is the LBA that actually failed. CONDITION MET. See section midlevel codesValue | Symbol ======|===================== 0x00 | GOOD 0x01 |
Because the SCSI Sense code formats are maintained by the T10 committee, consult the T10 standards documentation to determine the meaning of the codes. If there is a flaky link these errors can come and go from time to time and it will be hard to communicate with the device. The routine scsi_done from scsi.c does a very differentiated handling based on host_byte(), status_byte(), msg_byte() and the suggestion. There are only 4 permitted values for these 7 lower bits: 70h — fixed format, current sense 71h — fixed format, previous sense 72h — descriptor format, current sense 73h —
Next up we find 3h as the second nibble in the third byte which tells us that this is a medium error. Operator intervention may be required to correct this condition. 0x03 MEDIUM ERROR Indicates that the command terminated with a non-recovered error condition that may have been caused by a flaw in The SCSI Sense codes follow an industry standard maintained by Technical Committee T10, which is a part of the International Committee on Information Technology Standards (INCITS). The command that you performed is likely to be just fine but there was some other condition in the device that requires the user’s attention.
CHECK CONDITION. Aborted Task When a communication link fails or a command is aborted you can get this sense key, it cannot be directly attributed as a failure in the device, it is For example, the 0x5 0x25 0x0 field from the error message can be represented as sense=5 asc=25 ascq=0. The details both formats provide are the same just the decoding mechanics are different.
The ASC/ASCQ are listed at the T10 ASC/ASCQ page.