Re: MD/RAID time out writing superblock

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Mark Lord <liml@xxxxxx> writes:

> I suspect we're missing some info from this specific failure.
> Looking back at Chris's earlier posting, the whole thing started
> with a FLUSH_CACHE_EXT failure.  Once that happens, all bets are
> off on anything that follows.
> 
> >Everything will be running fine when suddenly:
> >
> >  ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> >  ata1.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0
> >          res 40/00:00:80:17:91/00:00:37:00:00/40 Emask 0x4 (timeout)
> >  ata1.00: status: { DRDY }
> >  ata1: hard resetting link
> >  ata1: softreset failed (device not ready)
> >  ata1: hard resetting link
> >  ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
> >  ata1.00: configured for UDMA/133
> >  ata1: EH complete
> >  end_request: I/O error, dev sda, sector 1465147272
> >  md: super_written gets error=-5, uptodate=0
> >  raid10: Disk failure on sda3, disabling device.
> >  raid10: Operation continuing on 5 devices.

Hi Mark. Yes, when the first timeout after a clean boot happens, it's with
an 0xea flush command every time:

  [...]
  ata5: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
  ata5.00: ATA-8: ST3750523AS, CC34, max UDMA/133
  ata5.00: 1465149168 sectors, multi 0: LBA48 NCQ (depth 31/32)
  ata5.00: configured for UDMA/133
  scsi 4:0:0:0: Direct-Access     ATA      ST3750523AS      CC34 PQ: 0 ANSI: 5
  sd 4:0:0:0: [sde] 1465149168 512-byte hardware sectors: (750 GB/698 GiB)
  sd 4:0:0:0: [sde] Write Protect is off
  sd 4:0:0:0: [sde] Mode Sense: 00 3a 00 00
  sd 4:0:0:0: [sde] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
  sd 4:0:0:0: [sde] 1465149168 512-byte hardware sectors: (750 GB/698 GiB)
  sd 4:0:0:0: [sde] Write Protect is off
  sd 4:0:0:0: [sde] Mode Sense: 00 3a 00 00
  sd 4:0:0:0: [sde] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
   sde: sde1 sde2 sde3
  sd 4:0:0:0: [sde] Attached SCSI disk
  sd 4:0:0:0: Attached scsi generic sg4 type 0

  [later]
  ata5.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
  ata5.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0
           res 40/00:00:00:4f:c2/00:00:00:00:00/40 Emask 0x4 (timeout)
  ata5.00: status: { DRDY }
  ata5: hard resetting link
  ata5: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
  ata5.00: configured for UDMA/133
  ata5: EH complete
  sd 4:0:0:0: [sde] 1465149168 512-byte hardware sectors: (750 GB/698 GiB)
  sd 4:0:0:0: [sde] Write Protect is off
  sd 4:0:0:0: [sde] Mode Sense: 00 3a 00 00
  sd 4:0:0:0: [sde] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
  end_request: I/O error, dev sde, sector 1465147264
  md: super_written gets error=-5, uptodate=0
  raid10: Disk failure on sde3, disabling device.
  raid10: Operation continuing on 4 devices.

Best wishes,

Chris.
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