spontaneous unmount

[Albert Graham]

Would you be using an auto mounter ?


T. Horsnell wrote:
> I'm gradually migrating my Alpha server over to an Opteron box running RHEL4.
> This involves various disk juggling including hot-plugging SCSI disks on the
> RH box. All the disks are in external shelves. Every now and then, some of
> the filesystems on this box spontaneously unmount. Until now, the unmounts
> seem to have been associated with adding/removing disks on the RH system
> and I've been logging the mount situation every 5 mins to try and get a clue
> why. However, during the the most recent unmount (5 filesystems unmounted)
> I wasnt juggling any disks, but I see this in the messages log within the
> 5 minute window during which the 5 filesystems disappeared.
> Is this significant?:
>
> Jul  6 18:44:15 ls1 kernel: mtrr: type mismatch for fd000000,800000 old: write-back new: write-combining
>
> At the time, I was killing and restarting rhnsd because of an rpm lockup
> due to a stalled up2date. This wasnt updating anything, just installing
> xemacs, and I had to kill all processes which had /var/lib/rpm/__db* open
> as reported by lsof.
>
> The 5 disks (one filesystem per disk) happen to be on 3 different Adaptec SCSI
> adapters, and in 3 different Storcase disk shelves, so I dont suspect an
> adapter fault or a disk-shelf fault.
>
> So far, Gooling and Bugzilla searching has shown up nothing, so
> any clues/suggestions would be greatly appreciated.
>
>
> Cheers,
> Terry.
>
>