# [OmniOS-discuss] How bad are these controller / io errors??

Narayan Desai narayan.desai at gmail.com
Fri Aug 16 01:25:08 UTC 2013

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    We're seeing something similar on the same gear (LSI/supermicro expanders,
    lsi controllers, sata drives).

    We've tried standard hardware debugging (cable reseat/replacement, etc) and
    the problem in our case seems to follow the sas expander backplane.

    We did a disk by disk migration into a different expander and they stopped.

    How high are your error counts? (in our case, we were getting about
    1500/day/device). Is your performance impacted? (it was in our case)
     -nld

    On Tue, Aug 13, 2013 at 10:20 AM, <steve at linuxsuite.org> wrote:

    >
    >    Howdy!
    >
    >          This is a SuperMicro JBOD with SATA disks. I am aware of the
    > issues of having
    > SATA on SAS, but was wondering just how serious these kinds of errors
    > are.. a scrub of the pool
    > completes without noticable problems.. I did a lot of stress testing
    > earlier and could
    > not get a failure. Disabling NCQ on the controller was a neccessary.
    > What is the practical risk to data??
    >
    >         See below info for iostat / syslog
    >
    >  thanx - steve
    >
    >            syslog info
    >
    > kern.warning<4>: Aug 13 10:39:10 dfs1 scsi: [ID 243001 kern.warning]
    > WARNING: /pci at 0,0/pci8086,340d at 6/pci1000,3080 at 0 (mpt_sas0):
    > kern.warning<4>: Aug 13 10:39:10 dfs1 #011mptsas_handle_event_sync:
    > IOCStatus=0x8000, IOCLogInfo=0x31120303
    > kern.warning<4>: Aug 13 10:39:10 dfs1 scsi: [ID 243001 kern.warning]
    > WARNING: /pci at 0,0/pci8086,340d at 6/pci1000,3080 at 0 (mpt_sas0):
    > kern.warning<4>: Aug 13 10:39:10 dfs1 #011mptsas_handle_event_sync:
    > IOCStatus=0x8000, IOCLogInfo=0x31120436
    > kern.warning<4>: Aug 13 10:39:10 dfs1 scsi: [ID 243001 kern.warning]
    > WARNING: /pci at 0,0/pci8086,340d at 6/pci1000,3080 at 0 (mpt_sas0):
    > kern.warning<4>: Aug 13 10:39:10 dfs1 #011mptsas_handle_event:
    > IOCStatus=0x8000, IOCLogInfo=0x31120303
    > kern.warning<4>: Aug 13 10:39:10 dfs1 scsi: [ID 243001 kern.warning]
    > WARNING: /pci at 0,0/pci8086,340d at 6/pci1000,3080 at 0 (mpt_sas0):
    >
    > Blah Blah...
    >
    > kern.warning<4>: Aug 13 10:39:10 dfs1 #011mptsas_handle_event:
    > IOCStatus=0x8000, IOCLogInfo=0x31120436
    > kern.info<6>: Aug 13 10:39:11 dfs1 scsi: [ID 365881 kern.info]
    > /pci at 0,0/pci8086,340d at 6/pci1000,3080 at 0 (mpt_sas0):
    > kern.info<6>: Aug 13 10:39:11 dfs1 #011Log info 0x31120303 received for
    > target 13.
    > kern.info<6>: Aug 13 10:39:11 dfs1 #011scsi_status=0x0, ioc_status=0x804b,
    > scsi_state=0xc
    > kern.info<6>: Aug 13 10:39:11 dfs1 scsi: [ID 365881 kern.info]
    > /pci at 0,0/pci8086,340d at 6/pci1000,3080 at 0 (mpt_sas0):
    > kern.info<6>: Aug 13 10:39:11 dfs1 #011Log info 0x31120303 received for
    > target 13.
    > kern.info<6>: Aug 13 10:39:11 dfs1 #011scsi_status=0x0, ioc_status=0x804b,
    > scsi_state=0xc
    > kern.info<6>: Aug 13 10:39:11 dfs1 scsi: [ID 365881 kern.info]
    > /pci at 0,0/pci8086,340d at 6/pci1000,3080 at 0 (mpt_sas0):
    >
    >           Output of iostat -En
    >
    >          Looks like "Hard Errors" and "No Device" correspond. What
    > does "Transport Error" and "Recoverable" mean. I see no evidence
    > of data corruption/loss, does ZFS deal/recover from these errors in a
    > good/safe
    > way?
    >
    >
    > c5t5000C500489947A8d0 Soft Errors: 0 Hard Errors: 2 Transport Errors: 11
    > Vendor: ATA      Product: ST3000DM001-9YN1 Revision: CC4H Serial No:
    > W1F0AAMA
    > Size: 3000.59GB <3000592982016 bytes>
    > Media Error: 0 Device Not Ready: 0 No Device: 2 Recoverable: 0
    > Illegal Request: 2 Predictive Failure Analysis: 0
    >
    > c5t5000C500525EB2B9d0 Soft Errors: 0 Hard Errors: 5 Transport Errors: 46
    > Vendor: ATA      Product: ST3000DM001-9YN1 Revision: CC4H Serial No:
    > W1F0QM5H
    > Size: 3000.59GB <3000592982016 bytes>
    > Media Error: 0 Device Not Ready: 0 No Device: 5 Recoverable: 0
    > Illegal Request: 5 Predictive Failure Analysis: 0
    >
    > c5t5000C50045561CEAd0 Soft Errors: 0 Hard Errors: 1 Transport Errors: 7
    > Vendor: ATA      Product: ST3000DM001-9YN1 Revision: CC4H Serial No:
    > W1F09G4Q
    > Size: 3000.59GB <3000592982016 bytes>
    > Media Error: 0 Device Not Ready: 0 No Device: 1 Recoverable: 0
    > Illegal Request: 1 Predictive Failure Analysis: 0
    >
    >
    >
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