Re: spontaneous unmount - getting warm

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Your last question prompted me to experiment.
I do most of my sysadmin stuff from a remote terminal
(its very cold in the machine room) and the console is
usually left logged in for long periods. But what the
experiment reveals is that when I log out of the console,
it seems to reset the mount situation to the state it was
at when the console was logged in.
i.e. any filesystems that were manually mounted either
from the console or a remote terminal, get dismounted.
If they are manually mounted from a rmote terminal whilst
the console is logged out, they remain so after console login/out.

Is this to be expected? I thought this sort of thing only
applied to removable media. My fstab entries are of the form:

LABEL=/gn23             /gn23                   ext3    defaults        1 2


>They have entries in the fstab file and are intended to be
>mounted at boot time. As I add new drives, I edit
>fstab but mount them manually. If I do this at the console,
>I'm in Gnome, but I also do it from an xterm window on
>a different machine after ssh'ing to the Opteron box.
>The machine hasnt been rebooted for nearly 3 months
>and during that time I've added 20 - 30 disks.
>>Are these drives mounted form your /etc/fstab file or do you mount them 
>>manually, if manually, are you in KDE or Gnome at the time ?
>>T. Horsnell wrote:
>>>> Would you be using an auto mounter ?
>>> Yes, but only to automount NFS disks exported by another box.
>>> The disks that spontanously unmount are attached SCSI.
>>>> 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.
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