Upgrade to ext4, how?

[Andrew Farris]

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

-- 
Andrew Farris <lordmorgul at gmail.com> www.lordmorgul.net
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-- 
Andrew Farris <lordmorgul at gmail.com> www.lordmorgul.net
  gpg 0x8300BF29 fingerprint 071D FFE0 4CBC 13FC 7DEB  5BD5 5F89 8E1B 8300 BF29