Description of problem:

When trying to vgsplit a VG with a RAID 5 LV in it, the error presented points to an intenal LVM LV name, and not an existing user-usable LV. 

Version-Release number of selected component (if applicable):

lvm2-2.02.107-1.el6.x86_64


How reproducible:
Everytime

Steps to Reproduce:

[root@virt-015 ~]# vgcreate seven /dev/sd{a..e}1
  Volume group "seven" successfully created
[root@virt-015 ~]# lvcreate --alloc anywhere --type raid5 -n raid -i 2 -L 100M seven /dev/sdc1 /dev/sdd1
  Using default stripesize 64.00 KiB
  Rounding size (25 extents) up to stripe boundary size (26 extents).
  Logical volume "raid" created
[root@virt-015 ~]# vgsplit -n raid seven ten
  Logical volume "raid_rimage_0" must be inactive

[root@virt-015 ~]# lvs
  LV      VG         Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  raid    seven      rwa-a-r--- 104.00m                                    100.00          
  lv_root vg_virt015 -wi-ao----   6.71g                                                    
  lv_swap vg_virt015 -wi-ao---- 816.00m                                 


[root@virt-015 ~]# lvs -a
  LV              VG         Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  raid            seven      rwa-a-r--- 104.00m                                    100.00          
  [raid_rimage_0] seven      iwa-aor---  52.00m                                                    
  [raid_rimage_1] seven      iwa-aor---  52.00m                                                    
  [raid_rimage_2] seven      iwa-aor---  52.00m                                                    
  [raid_rmeta_0]  seven      ewa-aor---   4.00m                                                    
  [raid_rmeta_1]  seven      ewa-aor---   4.00m                                                    
  [raid_rmeta_2]  seven      ewa-aor---   4.00m                                                    
  lv_root         vg_virt015 -wi-ao----   6.71g                                                    
  lv_swap         vg_virt015 -wi-ao---- 816.00m   


Actual results:

The error says that LV raid_rimage_0 must be inactive, but a quick check of lvs does not show it (as expected) in the list of LVs. Only lvs -a will show it as an internal LVM LV name.


Expected results:

If a user is presented with an error, it should point to a user-controllable LV and not one of the internal LV names.