[linux-lvm] lvremove: 'snapshot': can't remove 'active'? , non-mounted file system

[Linda A. Walsh]

lvremove -v /dev/Home/2010.06.27-06.18.55
    Using logical volume(s) on command line
  Can't remove open logical volume "2010.06.27-06.18.55"

But it isn't mounted.

So why is it saying it is 'open':

ll /dev/mapper shows:


crw-rw---- 1  10, 58 2010-02-02 21:08 control
brw-r----- 1 252,  4 2010-02-02 21:08 Home-2010.06.27--06.18.55
brw-r----- 1 252,  3 2010-02-02 21:08 Home-2010.06.27--06.18.55-cow
brw-r----- 1 252,  2 2010-02-02 21:08 Home-Home
brw-r----- 1 252,  1 2010-02-02 21:08 Home-Home-real
brw-r----- 1 252,  0 2010-02-02 21:08 Home-Share
brw-r----- 1 252,  5 2010-02-02 21:08 Space-Backup
brw-r----- 1 252, 11 2010-06-29 06:40 Space-boot
brw-r----- 1 252,  6 2010-06-29 06:40 Space-root
brw-r----- 1 252,  7 2010-06-28 17:45 Space-Torrents
brw-r----- 1 252,  8 2010-06-29 06:40 Space-usr
brw-r----- 1 252,  9 2010-06-29 06:40 Space-var
brw-r----- 1 252, 10 2010-06-29 06:40 Space-var_cache

So 252 is the mapper device?

Is my real Home partition on 252,1?

I just got a backup error when I tried to backup Home,
which would correspond to 252,2 above.  It thinks it
is no longer the same file system as the previous backup,

Should I be backing up Home-Home-real?  That doesn't
seem right...