what is going on with "/dev/dm" [important!]

Gene Czarcinski gene at czarc.net
Sun Sep 27 04:04:53 UTC 2009


On Friday 25 September 2009 16:15:32 Gene Czarcinski wrote:
> Oops ... do we have a new "feature"?  I do not like this one.
> 
> Whereas, the results of "df" was something of the form:
> /dev/mapper/<whatever>
> 
> I am now getting on my f12 alpha/rawhide sytem:
> /dev/dm-<number>
> 
> Doing a little search of the mailing list archives, I find the entry dated
> around 2 July:
> 
> 
===========================================================================
> ===== e2fsprogs-1.41.4-12.fc11 (FEDORA-2009-7278)
>  Utilities for managing ext2, ext3, and ext4 filesystems
> ---------------------------------------------------------------------------
> ----- ChangeLog:
> 
> * Wed Jun 24 2009 Eric Sandeen <sandeen at redhat.com> 1.41.4-12
> - blkid: use /dev/mapper/<name> vs /dev/dm-<N> (#497259)
> * Thu Jun 18 2009 Eric Sandeen <sandeen at redhat.com> 1.41.4-11
> - Update journal backup blocks in sb after resize (#505339)
> - Fix memory leak in extent handling functions
> ---------------------------------------------------------------------------
> ----- References:
> 
>   [ 1 ] Bug #505339 - error still found with fsck after resizing during
>  live image creation
>         https://bugzilla.redhat.com/show_bug.cgi?id=505339
>   [ 2 ] Bug #507461 - blkid returns dm-* for UUIDs instead of /dev/mapper
>  name https://bugzilla.redhat.com/show_bug.cgi?id=507461
>   [ 3 ] Bug #497259 - F10-F11: /dev/dm-N devices cause loss of all rescue
> ability
>         https://bugzilla.redhat.com/show_bug.cgi?id=497259
> ---------------------------------------------------------------------------
> ----
> 
> Is this new "feature" something we are going to have to live with??


I believe that we cannot live with this ... or at least anaconda cannot:
https://bugzilla.redhat.com/show_bug.cgi?id=525912

Gene
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