During FC1 to FC4 upgrade, Do I need to upgrade Ext3 file systems?
Robinson Tiemuqinke
hahaha_30k at yahoo.com
Sat Feb 25 05:05:21 UTC 2006
James,
Thanks a lot for you suggestion!
In fact, I turned off the SElinux because of lots of
warning/error messages were added in my
/var/log/messages when I turned it on. SElinux may be
still in its early stage and I don't have too much
time to debug stuff.
As far as Access control list (ACLs) is concerned, I
don't have it currently, But I know that ACLs on
Solaris are pretty cool, so definitely I will play
with ACLs on Linux shortly.
Thanks.
--- James Wilkinson <fedora at westexe.demon.co.uk>
wrote:
> Robinson Tiemuqinke wrote:
> > I'm doing FC1 to FC4 upgrade these days and I
> find
> > that the ext3 file system features of FC1 and FC4
> are
> > different.
> >
> > For FC4, there are three more ext3 file system
> > features are on: they are ext_attr, resieze_inode,
> and
> > dir_index.
> >
> > FC4:
> >
> > Filesystem features: has_journal ext_attr
> > resize_inode dir_index filetype needs_recovery
> > sparse_super large_file
> >
> > FC1:
> > Filesystem features: has_journal filetype
> > needs_recovery sparse_super large_file
> >
> > So How do I add these 3 ext3 features to untouched
> > data partitions like /home after my server is
> upgraded
> > to FC4? Do I have to do it manually? or the
> upgrade
> > will do it for me automatically? I'm afraid of
> losing
> > precious data but still like to have cool new
> > features.
> >
> > Any suggestions are greatly welcomed.
>
> First suggestion: if your data is precious, do a
> backup. Make sure it's
> good *before* you do the update.
>
> To be honest, I'd do the upgrade then worry about
> the features. I'm
> pretty sure the FC upgrade does them automatically,
> but it's been a
> while since I checked.
>
> Dir_index is indexed directory support: several
> years back, Dave Jones
> wrote:
>
> EXT3.
> ~~~~~
> - The ext3 filesystem has gained indexed
> directory support, which
> offers considerable performance gains when
> used on filesystems
> with directories containing large numbers of
> files.
> - In order to use the htree feature, you need at
> least version
> 1.32 of e2fsprogs.
> - Existing filesystems can be converted using
> the command
>
> tune2fs -O dir_index /dev/hdXXX
>
> See http://lwn.net/Articles/28765/ .
>
> Resize_inode is only of use if the filesystem is in
> a logical volume
> manager which allows a filesystem to be resized. One
> upgraded from FC1
> won't be. But, as before, you can run
> tune2fs -O resize_inode /dev/hdXXX
> to add it.
>
> Ext_attr, extended attributes, are necessary for
> SELinux support and
> access control lists. I wouldn't recommend turning
> SELinux off
> permanently, but if the worst comes to the worst,
> you can turn it off
> temporarily at the grub prompt, boot, add ext_attr,
> touch /.autorelabel,
> and reboot. The system will relabel everything on
> reboot.
>
> You can check the attributes on an ext3 filesystem
> with
> tune2fs -l /dev/hdXX
> But you probably knew that anyway.
>
> Hope this helps,
>
> James.
>
> --
> E-mail address: james | "But alas, we don't need a
> car, so I have a bus
> @westexe.demon.co.uk | timetable and one day the
> buses will read it too."
> | -- Telsa Gwynne
>
> --
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