[NTLUG:Discuss] File system problem, on a RH 7.3 machine

[Terry]

On Thu, 16 Sep 2004 08:47:30 -0400, Bryan J. Smith <b.j.smith at ieee.org> wrote:
> On Wed, 2004-09-15 at 23:56, Douglas King wrote:
> > I have a server that needs to have a "check disk" run on the drive.  I have
> > found out that it is the backup machine that craters the web server every
> > night.  I forced a backup this morning on the a few of the directories, and
> > it locked the system up.  I am using the scp backup method.  My question
> > is....HOW do I run the following commands:
> > On the command line while the server is running, I enter:
> > e2fsck -b 8193 /dev/hda1
> 
> Are you sure you want to tell it to use an alternative superblock?
> You typically don't need to do that unless prompted.
> 
> > After I try this, I get:
> > WARNING!!!  Running e2fsck on a mounted filesystem may cause
> > SEVERE filesystem damage.
> > Do you really want to continue (y/n)? no
> > How do I need to do this safely, hopefully without loosing an data?
> 
> You cannot check the disk while it is mounted read/write -- i.e.,
> on-line.  That's why we call an fsck an "off-line" repair.**
> The filesystem must either not be mounted, or mounted "read-only" so
> _nothing_ is changing on it.**
> 
> Try mounting it read-only first:
> 
>   mount -o remount,rw /dev/(device) /(mountpoint)

Didn't you mean:
mount -o remount,ro /dev/(device) /(mountpoint)   ?

Isn't it:
rw = read write
ro = read only    ?

> 
> Then run e2fsck.
> 
> If the filesystem had errors, you shouldn't have been able to mount it
> in the first place.  Unless you force mounted it.
> 
> -- Bryan
> 
> **NOTE:  MS-DOS (including MS-DOS 7 aka Windows 95/98/ME) is the only
> operating system in the world that attempts to repair a FAT filesystem
> while it is mounted read/write.  Why?  Because only FAT filesystems are
> always assumed to be consistent, and it's up to the user not let any
> checking run (possibly because the OS believes the system was not shut
> down proper, but the filesystem itself does not have such a flag).
> 
> --
> Bryan J. Smith                                  b.j.smith at ieee.org
> ------------------------------------------------------------------
> "Communities don't have rights. Only individuals in the community
>  have rights. ... That idea of community rights is firmly rooted
>  in the 'Communist Manifesto.'" -- Michael Badnarik
> 
> 
> 
> 
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