Thank you for the feedback Neil.
Although, your last comment did confuse me a little...run what in
parallel? Should I be running badblocks against the unassembled
components of the raid and then doing something like:
>fsck -l /badblockfile_sda3.txt /dev/md0
>fsck -l /badblockfile_sdb3.txt /dev/md0
>fsck -l /badblockfile_sdc3.txt /dev/md0
>fsck -l /badblockfile_sdd3.txt /dev/md0
This runs contrary to my understanding on how badblocks works...I
thought it worked only on a complete filesystem (e.g. /dev/md0). What
would I pass it for the blocksize?
I got the following for dumpe2fs /dev/md0:
dumpe2fs 1.38 (30-Jun-2005)
Filesystem volume name: /
Last mounted on: <not available>
Filesystem UUID: e836c5d0-dbfc-4694-b53d-69951c8dd74e
Filesystem magic number: 0xEF53
Filesystem revision #: 1 (dynamic)
Filesystem features: has_journal filetype sparse_super large_file
Default mount options: (none)
Filesystem state: clean
Errors behavior: Continue
Filesystem OS type: Linux
Inode count: 90718208
Block count: 181417968
Reserved block count: 9070898
Free blocks: 66621090
Free inodes: 90203736
First block: 0
Block size: 4096
Fragment size: 4096
Blocks per group: 32768
Fragments per group: 32768
Inodes per group: 16384
Inode blocks per group: 512
Last mount time: Wed Nov 30 05:46:11 2005
Last write time: Wed Nov 30 09:25:22 2005
Mount count: 20
Maximum mount count: 30
Last checked: Sun Oct 16 18:13:18 2005
Check interval: 0 (<none>)
Reserved blocks uid: 0 (user root)
Reserved blocks gid: 0 (group root)
First inode: 11
Inode size: 128
Journal inode: 8
Journal backup: inode blocks
I was about to proceed with "fsck -c -n /dev/md0"...but it sounds like
you have something better in mind maybe?
On 12/2/05, Neil Brown <neilb@xxxxxxx> wrote:
> On Friday December 2, erich.newell@xxxxxxxxx wrote:
> >
> > Which generates errors when I try and copy off large amounts of data:
> > About ten of these:
> > ata1: translated ATA stat/err 0x25/00 to SCSI SK/ASC/ASCQ 0x4/00/00
> > ata1: status=0x25 { DeviceFault CorrectedError Error }
> > SCSI error : <0 0 0 0> return code = 0x8000002
> > sda: Current: sense key: Hardware Error
> > Additional sense: No additional sense information
> > end_request: I/O error, dev sda, sector 489794513
>
> Sounds like there is something badly wrong with your hardware. I've
> no idea what though ... maybe a bad cable??
>
> >
> > Should I do this:
> > > fsck -n -c /dev/md0
> > > mdadm --assemble /dev/md0
> > > mdadm --add /dev/md0 /dev/sdb3
>
> The ordering looks wrong (you cannot fsck before you assemble) , but
> it is probably your best bet (assume you don't have ongoing hardware
> errors).
>
> >
> > or this:
> > > mdadm -c /dev/md0 -l 5 -n 4 -x 0 -f /dev/sdd3 /dev/sdc3
> > /dev/sdb3 /dev/sda3
> > > mdadm -S /dev/md0
> > > mdadm --assemble --update=resync /dev/md0
>
> You mean '-C', not '-c', and the last two steps are pointless after
> the first. But your first option is probably best, not that there is
> liekly to be a big difference in the result.
>
> >
> > or ???
> >
> > If anyone has this knowledge, please share. I'm in over my head on this one.
> >
> > Thanks in advance!
> >
> > P.S. I am currently running a non-distructive badblock check while I
> > wait for expert advice:
>
> That's a good idea. I would do that on all the devices... in parallel.
>
> NeilBrown
>
--
"A man is defined by the questions that he asks; and the way he goes
about finding the answers to those questions is the way he goes
through life."
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