[CentOS] rare but repeating system crash in C7

Sun Jan 3 19:00:51 UTC 2021
Fred <fred.fredex at gmail.com>

$ cat /etc/centos-release
CentOS Linux release 7.9.2009 (Core)

$ sudo systemctl status mnt-backup.mount mnt-backup.automount
[sudo] password for fredex:
● mnt-backup.mount - /mnt/backup
   Loaded: loaded (/etc/fstab; bad; vendor preset: disabled)
   Active: active (mounted) since Sat 2021-01-02 22:20:05 EST; 14h ago
    Where: /mnt/backup
     What: /dev/sdc1
     Docs: man:fstab(5)
           man:systemd-fstab-generator(8)
    Tasks: 0

● mnt-backup.automount
   Loaded: loaded
   Active: inactive (dead)
    Where: /mnt/backup
[fredex at fcshome Desktop]$ systemctl cat mnt-backup.mount
mnt-backup.automount
No files found for mnt-backup.automount.
# /run/systemd/generator/mnt-backup.mount
# Automatically generated by systemd-fstab-generator

[Unit]
SourcePath=/etc/fstab
Documentation=man:fstab(5) man:systemd-fstab-generator(8)
RequiresOverridable=systemd-fsck at dev-disk-by
\x2duuid-259ec5ea\x2de8a4\x2d465a\x2
After=systemd-fsck at dev-disk-by
\x2duuid-259ec5ea\x2de8a4\x2d465a\x2d9263\x2d1c062

[Mount]
What=/dev/disk/by-uuid/259ec5ea-e8a4-465a-9263-1c06217b9aaf
Where=/mnt/backup
Type=ext4
Options=noauto

the fstab statement I put in my last posting was a copy/paste from
/etc/fstab, so it should be correct as shown. I don't see a comma before
noauto.



On Sun, Jan 3, 2021 at 11:42 AM Strahil Nikolov <hunter86_bg at yahoo.com>
wrote:

> Are you still on 7.6 ? I recently discovered that a bug in sysstat was
> fixed in 7.7 that prevented autofs from umounting the filesystem.
>
> The following should show if it's taking into action:
> systemctl status mnt-backup.mount mnt-backup.automount
> systemctl cat mnt-backup.mount mnt-backup.automount
>
>
> Are you sure that you got no "," before that "noauto" ?
>
> Best Regards,
> Strahil Nikolov
>
>
>
>
>
>
> В неделя, 3 януари 2021 г., 16:25:47 Гринуич+2, Fred <
> fred.fredex at gmail.com> написа:
>
>
>
>
>
> Strahil:
>
> I WAS using that, but the automatic umount never worked, leaving it
> mounted all the time.
>
> I commented out those entries in /etc/auto.master before modifying the
> fstab entry:
>
> UUID=259ec5ea-e8a4-465a-9263-1c06217b9aaf       /mnt/backup
> ext4,x-systemd.automount,x-systemd.idle-timeout=15min   noauto  0       2
>
> which is exactly as it was before except for the x-systemd entries as you
> described.
>
> and the peculiar thing is it STILL does not automount. and yes, I did do
> systemctl restart local-fs.target.
>
> do I need to reboot (or something simpler, maybe) to fully disable the
> auto.master stuff?
>
> Thanks again!
>
> Fred
>
> On Sun, Jan 3, 2021 at 5:54 AM Strahil Nikolov via CentOS <
> centos at centos.org> wrote:
> > Hi Fred,
> >
> > do you use automatic umount for the map in /etc/auto.master (--timeout) ?
> >
> > If yes, then the systemd mount options probably won't help.
> >
> > Best Regards,
> > Strahil Nikolov
> >
> >
> >
> >
> >
> >
> >
> >
> > В неделя, 3 януари 2021 г., 04:27:17 Гринуич+2, Fred <
> fred.fredex at gmail.com> написа:
> >
> >
> >
> >
> >
> > Yeah, and the instructions for setting RAID-1 or RAID-0 have the switch
> > positions exactly reversed.
> >
> > Strahil: I'm using autofs to automount the unit. but just turned that off
> > and enabled the xsystemd.automount in fstab, we'll see how that works.
> >
> > Fred
> >
> >
> > On Sat, Jan 2, 2021 at 4:11 PM Warren Young <warren at etr-usa.com> wrote:
> >
> >> On Jan 2, 2021, at 11:17 AM, Fred <fred.fredex at gmail.com> wrote:
> >> >
> >> > I assume that the yottamaster device runs Linux, just like 99% of
> other
> >> > such devices.
> >>
> >> 99% of NAS boxes, maybe, but not dumb RAID boxes like the one I believe
> >> you’re referring to.
> >>
> >> (And I doubt even that, with the likes of FreeNAS extending down from
> the
> >> enterprise space where consumer volume can affect that sort of thing.)
> >>
> >> I have more than speculation to back that guess: the available firmware
> >> images are far too small to contain a Linux OS image, their manuals
> don’t
> >> talk about Linux or GPL that I can see, and there’s no place to download
> >> their Linux source code per the GPL.
> >>
> >> While doing this exploration, I’ve run into multiple problems with their
> >> web site, which strengthens my suspicion that this box is your
> culprit.  If
> >> they’re this slipshod with their marketing material, what does that say
> >> about their engineering department?
> >> _______________________________________________
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> >
> >>
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