Avoiding SCSI Transport Errors while Running Explorer/Extractor/Sccli with Sun Storage 3310 Arrays
(Doc ID 1003736.1)
Last updated on SEPTEMBER 01, 2019
Applies to:
Sun Storage 3310 Array - Version Not Applicable and laterAll Platforms
Symptoms
- Bus resets.
- Degraded performance.
- ASC: 0x29 (power on, reset, or bus reset occurred), ASCQ: 0x0, FRU: 0x0
When an explorer, extractor, or sccli command is run on a host connected to a Sun Storage 3310 SCSI Array with I/O occurring to the array, in some configurations, we may see a long pause followed by bus resets. Bus resets cause the pending I/Os to be aborted, causing unnecessary command retries which may impact array performance.
The following is an example of the messages:
Dec 6 10:00:08 xyz scsi: [ID 107833 kern.warning] WARNING: /pci@1d,700000/pci@1/scsi@4/sd@0,1 (sd79): Dec 6 10:00:08 xyz SCSI transport failed: reason 'reset': retrying command Dec 6 10:00:11 xyz scsi: [ID 107833 kern.warning] WARNING: /pci@1d,700000/pci@1/scsi@4/sd@0,1 (sd79): Dec 6 10:00:11 xyz Error for Command: write(10) Error Level: Retryable Dec 6 10:00:11 xyz scsi: [ID 107833 kern.notice] Requested Block: 310860508 Error Block: 310860508 Dec 6 10:00:11 xyz scsi: [ID 107833 kern.notice] Vendor: SUN Serial Number: 6215C0B5-00 Dec 6 10:00:11 xyz scsi: [ID 107833 kern.notice] Sense Key: Unit Attention Dec 6 10:00:11 xyz scsi: [ID 107833 kern.notice] ASC: 0x29 (power on, reset, or bus reset occurred), ASCQ: 0x0, FRU:0x0
Cause
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