[PLUG] Does your favorite rescue CD recognize your current filesystemm?

[Patrick J. Timlick]

Ext4 gives a me noticeable increase in performance over ext3 and has given
me no problems.  I concluded that ext4 is worth the risk.  Google has
evidently come to a similar conclusion:

http://arstechnica.com/open-source/news/2010/01/google-upgrading-to-ext4-hires-former-linux-foundation-cto.ars

-- Pat

On Sat, Jan 16, 2010 at 7:13 PM, Carlos Konstanski <
ckonstanski at pippiandcarlos.com> wrote:

> On Sat, 16 Jan 2010, John Jason Jordan wrote:
>
> > Date: Sat, 16 Jan 2010 18:52:53 -0800
> > From: John Jason Jordan <johnxj at comcast.net>
> > Reply-To: "General Linux/UNIX discussion and help;    civil and on-topic"
> >     <plug at lists.pdxlinux.org>
> > To: PLUG <plug at lists.pdxlinux.org>
> > Subject: [PLUG] Does your favorite rescue CD recognize your current
> filesystem?
> >
> > I have been using Fedora 11, x86_64 for about a month now. It just
> > occurred to me to check what fileystem Fedora installed. I recall
> > during the installation I told it to use the entire hard disk and just
> > clicked OK on the defaults. Turns out that it created a 200 MB ext3
> > boot partition and a logical volume of 297 GB which contains an ext4
> > root partition and a small swap partition.
> >
> > I have several rescue CDs, from Knoppix to smaller command line only
> > disks. Guess what? They're all too old to be able to fix an ext4
> > filesystem. My very, very dim understanding is that older systems
> > (with ext3) can read/write to an ext4 filesystem, but the older e2fsck
> > won't work. I may well be wrong about the read/write - that is, I may
> > have it backwards.
> >
> > Fedora started using ext4 with Fedora 10. Ubuntu made it optional with
> > Jaunty, and Karmic uses it exclusively.
> >
> > It's Clinic Eve, so I am downloading some more recent rescue CDs. At
> > the Clinic tomorrow I will boot them and see which ones can deal with
> > my ext4 root partition.
>
> ext4 is a stopgap version of ext. It adds some features that are on
> the roadmap for btrfs. It figures that Fedora would be all over ext4,
> even though it isn't really even intended to last once btrfs comes
> out. If I were in your shoes, I would avoid it.
>
> Carlos
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-- 
p.j.timlick at ieee.org
www.timlick.com
503-476-3119
10990 NE Paren Springs Rd.
Dundee OR 97115