[nzlug] Ext3 file system

[cr]

On Monday 30 October 2006 22:38, Michal Ludvig wrote:
> cr wrote:
> > Can anyone tell me - is there any quick easy way to tell if a filesystem
> > has been 'converted' to Ext3?   Is it safe to run 'tune2fs' on a system
> > that's ext3 already?
>
> ~# dumpe2fs -h /dev/mapper/big-data
> dumpe2fs 1.37 (21-Mar-2005)
> Filesystem volume name:   <none>
> Last mounted on:          <not available>
> Filesystem UUID:          f5d7bfab-3c3f-4c88-88a9-e5c2f8ea9c19
> Filesystem magic number:  0xEF53
> Filesystem revision #:    1 (dynamic)
> Filesystem features:      has_journal ext_attr filetype [...]
>                           ^^^^^^^^^^^

Thanks!

> > drive (thank goodness) except for recent emails and, of course, my old
> > fstab file.    And of course I can't remember which partitions were ext2
> > and which were ext3.   (Currently they're all mounted ext2, which I
> > gather should be safe).
>
> You can use "auto" as the fs type and the kernel will try to guess.
> Works well for most common filesystems.

I read that in the manuals.   I guess it's just some minor paranoia that makes 
me want to _know_ what each filesystem is, so I can put it in fstab and be 
sure the system is reading it appropriately.   Oh, and I guess, if I have any 
partitions that are ext2 and I think should be ext3, I need to know so that I 
can make them so.   :)

cr