Re: ext3, S/W RAID-5 and many services

["P. Fleury" <fleury users sourceforge net>]

Well, I have no kernel message.

I did have some traps (I guess these are messages from a segfault of a 
module) from the raid5 code to resync the disks after an improper 
shutdown, but I tracked this down to a failing RAID-array disk. After 
replacement of the disk, resyncing the array,  reformating and restoring 
the data, I never saw any kernel failures (it's now about 2 weeks, the 
machine is running constantly and used by 2-3 users in day time for the 
moment).

Also, my backups are from before the disk failure. How bad can this 
affect the behavior of the system, if the files I have restored are 
corrupt ? I should not thwart the FS, should it?

Is there a way to detect failing disks ? (my guess is no, but I still 
ask...)

Pascal

Stephen C. Tweedie wrote:

> Hi,
>
> On Fri, Jan 18, 2002 at 04:15:28PM +0900, P. Fleury wrote:
>
>
> > I use ext3 over Software RAID-5, and access this through Samba/NFS/HTTP. 
> > From time to time, the machine  hangs,  no response to any kind of 
> > input (ping does not respond, nor keyboard/mouse). Only hard-reset does 
> > the trick.
> >
> > I also notices that 2 of the 7 disks are in UDMA 33, the others in UDMA 
> > 100. Does this have any impact ? (besides performance)
> >
> > If I do not mount the ext3 partition, it runs fine. Any help ?
>
> Can you trap kernel log output, in case there's an oops being
> reported?  If you have a text-mode console, you may have to copy it
> down by hand.  If not, it is possible to set up a serial console and
> record the kernel output on another machine.
>
> Cheers,
> Stephen