On Wed, Dec 22, 1999 at 12:59:22PM -0700, Jason R. Mastaler wrote:
> We are having a peculiar problem with Linux software RAID on a new
> fileserver. The server is running kernel 2.2.12 configured to support
> both RAID-5 and RAID-0. We are using raidtools-0.90-5 which came with
> this redhat-based installation. On this machine, we have two raid
> devices configured: md0 is a 7 disk RAID-5 array, and md1 is a 3 disk
> RAID-5 array (see attached /etc/raidtab below for configuration
> details)
2.2.12 with RAID patch ? Did you apply the patch yourself ?
Try 2.2.13ac3 instead. Or 2.2.14ac1 as soon as it gets out. Those
kernels have RAID support (well, presumably 2.2.14ac1 will have too),
and some filesystem bugs have been corrected lately.
> The problem is that the data on md0 just disappears for no apparent
> reason and with no indications in the logfiles. This is terribly
> repeatable. Once /dev/md0 is mounted, all files and directories
> placed there will not last more than two hours. They just vanish
> without a trace. Re-creating and re-formatting md0 doesn't help. We
> have even tried a different raid level (zero) on md0 and have the same
> problem.
This must be a filesystem problem, not a RAID problem. If the RAID
device was losing data, the filesystem would be lost too, and you would
be unable to mount the device.
Try e2fsck -f /dev/md0
If that one doesn't give you errors, the RAID works perfectly. Something
else is biting you.
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