[Cialug] Spontaneous Outbreak of Read-Only-ness

[Scott Yates]

Also check you have inodes available.  I saw this happen when php would
just decided not to clean up its 0-byte session files.  like EVER.  Once I
located them and cleared them out, all was good again.

this command

df -i

will show if the inode pool has run out.

On Wed, Feb 24, 2016 at 12:20 PM, Jeffrey Ollie <jeff at ocjtech.us> wrote:

> If you have access to it SpinRite can help revive a dying disk long enough
> to get the data off, but I agree with the others, once a disk starts acting
> up it's best to replace it before it dies completely.
>
> On Wed, Feb 24, 2016 at 12:09 PM, Daniel A. Ramaley <
> daniel.ramaley at drake.edu> wrote:
>
> > Are these physical or virtual machines? On virtual machines this sort of
> > thing is semi-normal and indicates something going wrong with the disk
> > virtualization (such as not passing data to the guest OS fast enough, so
> > the guest thinks the disk is going bad). I've experienced it quite a bit
> > with xen virtualization, anyway (both Citrix- and Oracle-flavored xen).
> >
> > On a physical machine, i'd echo the other suggestions to run fsck on
> > your disks. Also, if you do not have a recent backup, make one *today*.
> > You may be looking at a failing disk and need to replace it soon. If you
> > can replace it before it completely fails, then the process can be
> > relatively painless (you can migrate Linux to the new disk rather than
> > reinstalling from scratch).
> >
> > On 2016-02-24 at 11:24:27 Todd Walton wrote:
> > > I've had two weird read-only-izings happen in the past 24 hours.
> > >
> > > First, a RHEL 6 box: Found I couldn't write files to /tmp, even as
> > > root. Further poking revealed that I couldn't write to / either. 'cat
> > > /proc/mounts' said / was rw. Changing SELinux to permissive didn't
> > > help. Rebooted. All is well.
> > >
> > > Then, a CentOS 6 box: Tried to update root password. It took the
> > > password twice and then said "passwd: Authentication token
> > > manipulation error". I tried to mv the shadow file, thinking maybe
> > > I'd re-shadow passwd, but it wouldn't let me move it because...
> > > read-only filesystem. Again, 'cat /proc/mounts' showed that that
> > > should not have been the case. I rebooted and all is now well.
> > >
> > > I can't troubleshoot these further right now because I made the
> > > problem go away. But anybody seen this before?
> > >
> > > --
> > > Todd
> > > _______________________________________________
> > > Cialug mailing list
> > > Cialug at cialug.org
> > > https://na01.safelinks.protection.outlook.com/?url=http%3a%2f%2fcialug
> > > .org%2fmailman%2flistinfo%2fcialug&data=01%7c01%7cdaniel.ramaley%40dra
> > > ke.edu%7c60d172243f4247001c1a08d33d3f7e0f%7c6f028129009c4b33b633bbfc58
> > > bbd960%7c0&sdata=wzicW7%2b%2bn3vshhTbMnel7qdGLohYwdkKq6yt6cU3tLo%3d
> > __
> > Daniel A. Ramaley  |  Server Engineer 2
> > Information Technology Services (ITS) | Drake University
> >
> > T: +1 515 271-4540
> > F: +1 515 271-1938
> > E: daniel.ramaley at drake.edu
> >
> > _______________________________________________
> > Cialug mailing list
> > Cialug at cialug.org
> > http://cialug.org/mailman/listinfo/cialug
> >
>
>
>
> --
> Jeff Ollie
> _______________________________________________
> Cialug mailing list
> Cialug at cialug.org
> http://cialug.org/mailman/listinfo/cialug
>