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    SubjectRe: sata badness in 2.6.20-rc1? [Was: Re: md patches in -mm]
    Date
    I don't think it's in -rc1, please see below.

    On Friday, 15 December 2006 21:50, Neil Brown wrote:
    > On Friday December 15, thunder7@xs4all.nl wrote:
    > > From: Neil Brown <neilb@suse.de>
    > > Date: Wed, Dec 06, 2006 at 06:20:57PM +1100
    > > > i.e. current -mm is good for 2.6.20 (though I have a few other little
    > > > things I'll be sending in soon, they aren't related to the raid6
    > > > problem).
    > > >
    > > 2.6.20-rc1-mm1 doesn't boot on my box, due to the fact that e2fsck gives
    > >
    > > Buffer I/O error on device /dev/md0, logical block 0
    > >
    >
    > But before that....
    > > raid5: device sdh1 operational as raid disk 1
    > > raid5: device sdg1 operational as raid disk 0
    > > raid5: device sdf1 operational as raid disk 5
    > > raid5: device sde1 operational as raid disk 6
    > > raid5: device sdd1 operational as raid disk 7
    > > raid5: device sdc1 operational as raid disk 3
    > > raid5: device sdb1 operational as raid disk 2
    > > raid5: device sda1 operational as raid disk 4
    > > raid5: allocated 8462kB for md0
    > > raid5: raid level 6 set md0 active with 8 out of 8 devices, algorithm 2
    > > RAID5 conf printout:
    > > --- rd:8 wd:8
    > > disk 0, o:1, dev:sdg1
    > > disk 1, o:1, dev:sdh1
    > > disk 2, o:1, dev:sdb1
    > > disk 3, o:1, dev:sdc1
    > > disk 4, o:1, dev:sda1
    > > disk 5, o:1, dev:sdf1
    > > disk 6, o:1, dev:sde1
    > > disk 7, o:1, dev:sdd1
    > > md0: bitmap initialized from disk: read 15/15 pages, set 1 bits, status: 0
    > > created bitmap (233 pages) for device md0
    > > md: super_written gets error=-5, uptodate=0
    > > raid5: Disk failure on sde1, disabling device. Operation continuing on 7 devices
    > > md: super_written gets error=-5, uptodate=0
    > > raid5: Disk failure on sdg1, disabling device. Operation continuing on 6 devices
    > > md: super_written gets error=-5, uptodate=0
    > > raid5: Disk failure on sdf1, disabling device. Operation continuing on 5 devices
    > > md: super_written gets error=-5, uptodate=0
    > > raid5: Disk failure on sdc1, disabling device. Operation continuing on 4 devices
    > > md: super_written gets error=-5, uptodate=0
    > > raid5: Disk failure on sdb1, disabling device. Operation continuing on 3 devices
    > > md: super_written gets error=-5, uptodate=0
    > > raid5: Disk failure on sdh1, disabling device. Operation continuing on 2 devices
    > > md: super_written gets error=-5, uptodate=0
    > > raid5: Disk failure on sdd1, disabling device. Operation continuing on 1 devices
    > > md: super_written gets error=-5, uptodate=0
    > > raid5: Disk failure on sda1, disabling device. Operation continuing on 0 devices
    >
    > Oh dear, that array isn't much good any more.!
    > That is the second report I have had of this with sata drives. This
    > was raid456, the other was raid1. Two different sata drivers are
    > involved (sata_nv in this case, sata_uli in the other case).

    The other box is mine and it works just fine with 2.6.20-rc1.

    > I think something bad happened in sata land just recently.

    Yup. Please see, for example:

    http://marc.theaimsgroup.com/?l=linux-kernel&m=116621656432500&w=2

    It looks like the breakage is in sata, in the patches that went in after
    2.6.19-rc6-mm2 (that one worked for me like charm).

    Greetings,
    Rafael


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