Description of problem:
auto reinstall(dirty install) can't proceed if previous HostVG span multi disk, display as


"There appears to already be an installation  on another device:

  /dev/mapper/3600a0b80005b10ca00008e254c7726b1p1

The installation can't proceed until the device is remove"





we should differential HostVG on multi disk, and HostVG on different disk(other than storage_init), 


[root@amd-1216-8-5 ~]# pvs
  PV                                              VG     Fmt  Attr PSize  PFree
  /dev/mapper/3600a0b80005b0acc00008c204c7744bap3 HostVG lvm2 a-   19.52g    0
  /dev/mapper/3600a0b80005b10ca00008e254c7726b1p1 HostVG lvm2 a-   20.00g    0
[root@amd-1216-8-5 ~]# lvs
  LV      VG     Attr   LSize  Origin Snap%  Move Log Copy%  Convert
  Config  HostVG -wi-ao  8.00m
  Data    HostVG -wi-ao 29.66g
  Logging HostVG -wi-ao  2.00g
  Swap    HostVG -wi-ao  7.84g
[root@amd-1216-8-5 ~]# vgs
  VG     #PV #LV #SN Attr   VSize  VFree
  HostVG   2   4   0 wz--n- 39.52g    0 

Version-Release number of selected component (if applicable):
rhevh 6.1-14.1

How reproducible:
always with HostVG span multi disk, 

Steps to Reproduce:
1.installed a rhevh with HostVG span multi disk
2.auto reinstall with storage_init=$which_boot_disk
3.
  
Actual results:


Expected results:
auto reinstall with different disk layout should succeed, compare to install a different disk compare with the hostvg disk,  



Additional info: