Allan Wind wrote: > On 2009-09-18T00:44:45, Tejun Heo wrote: >> Hello, >> >> Chris Webb wrote: >>> It's quite hard for us to do this with these machines as we have >>> them managed by a third party in a datacentre to which we don't have >>> physical access. However, I could very easily get an extra 'test' >>> machine built in there, generate a work load that consistently >>> reproduces the problems on the six drives, and then retry with an >>> array build from 5, 4, 3 and 2 drives successively, taking out the >>> unused drives from chassis, to see if reducing the load on the power >>> supply with a smaller array helps. >> Yeap, that also should shed some light on it. > > I have a SuperMicro X8DT3-F motherboard with 2 (2 TB) WDC drives > of the 8 bays available in the machine. They are on a different > controller LSI Logic / Symbios Logic SAS1068E PCI-Express Fusion-MPT SAS > which was flashed into "Integrated Target Mode" to get it running > under Linux. > > Disabling smartmontools seems to have helped in terms of failure > frequency. It is almost always the 2nd drive that is kicked out > of the mirror although the last time it was the primary after > disabling smart. hddtemp was never running on this host. > > [2256003.055451] end_request: I/O error, dev sdb, sector 3907028974 > [2256003.055674] md: super_written gets error=-5, uptodate=0 > [2256003.055677] raid1: Disk failure on sdb2, disabling device. > [2256003.055678] raid1: Operation continuing on 1 devices. > [2256003.437315] RAID1 conf printout: > [2256003.437318] --- wd:1 rd:2 > [2256003.437321] disk 0, wo:0, o:1, dev:sda2 > [2256003.437323] disk 1, wo:1, o:0, dev:sdb2 > [2256003.440542] RAID1 conf printout: > [2256003.440545] --- wd:1 rd:2 > [2256003.440548] disk 0, wo:0, o:1, dev:sda2 > > [3880879.007618] end_request: I/O error, dev sda, sector 3907028974 > [3880879.007839] md: super_written gets error=-5, uptodate=0 > [3880879.007842] raid1: Disk failure on sda2, disabling device. > [3880879.007843] raid1: Operation continuing on 1 devices. > [3880879.028518] RAID1 conf printout: > [3880879.028521] --- wd:1 rd:2 > [3880879.028524] disk 0, wo:1, o:0, dev:sda2 > [3880879.028527] disk 1, wo:0, o:1, dev:sdb2 > [3880879.031607] RAID1 conf printout: > [3880879.031610] --- wd:1 rd:2 > [3880879.031613] disk 1, wo:0, o:1, dev:sdb2 > > There is barely any load on this box. Disabling NCQ did not help > for me. Can you please post full log? -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
