what is going on with "/dev/dm"

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(a)redhat.com&gt; 1.41.4-12 - blkid: use /dev/mapper/<name> vs /dev/dm-<N> (#497259) * Thu Jun 18 2009 Eric Sandeen <sandeen(a)redhat.com&gt; 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?? Gene