Upgrade to ext4, how?

Martin Sourada martin.sourada at gmail.com
Mon Apr 7 21:38:31 UTC 2008


On Mon, 2008-04-07 at 14:24 -0700, Andrew Farris wrote:
> Martin Sourada wrote:
> > EXT4-fs: dm0: not marked OK to use with test code.
> 
> > Perhaps I am missing some step that needs to be done first? Any thoughts
> > what's wrong there?
> 
> Ah, yes, missing step to set the device as ok to boot ext4dev.
>  From the devel-list announcement for ext4 'call for brave ext4 testers':
> 
> Eric Sandeen wrote:
>  > Jeffrey Ollie wrote:
>  >> EXT4-fs: dm-1: not marked OK to use with test code
>  >
>  > welcome to the bleeding edge; this is a new check that went into the
>  > most recent kernels.  But it's ok, really:
>  >
>  > Get e2fsprogs 1.40.5 from rawhide, boot up your rescue disk, and:
>  >
>  > [root]# debugfs -w /dev/<whatever>
>  > debugfs 1.40.5 (27-Jan-2008)
>  > debugfs:  set_super_value s_flags 4
>  > debugfs:  quit
>  >
>  > and you'll be fine.
>  >
>  > I've also got this info at http://fedoraproject.org/wiki/FedoraExt4; if
>  > anyone is having ext4 trouble please look there first.
>  >
>  > This is a safety check put in to make sure that ext3 never unexpectedly
>  > gets mounted with ext4dev (_development_) code.
>  >
>  > Thanks,
>  > -Eric
> 
Thanks,

this was indeed the only step that was missing. I actually went through
that page, but misunderstood that particular point as being optional. My
bad, I've read too fast :/

Martin
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