Comment # 10 on bug 1006952 from zhilong liu

1. prepare disks
# dd if=/dev/zero of=test1 bs=1M count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB, 1000 MiB) copied, 3.2826 s, 319 MB/s
# cp test1 test2
# losetup /dev/loop2 test1
# losetup /dev/loop2 test2
2. create pvs
# pvcreate /dev/loop1 /dev/loop2 
  allocation/use_blkid_wiping=1 configuration setting is set while LVM is not
compiled with blkid wiping support.
  Falling back to native LVM signature detection.
  allocation/use_blkid_wiping=1 configuration setting is set while LVM is not
compiled with blkid wiping support.
  Falling back to native LVM signature detection.
  Physical volume "/dev/loop1" successfully created.
  Physical volume "/dev/loop2" successfully created.
linux-tjrh:~ # vgcreate vg1 /dev/loop1 /dev/loop2
  allocation/use_blkid_wiping=1 configuration setting is set while LVM is not
compiled with blkid wiping support.
  Falling back to native LVM signature detection.
  allocation/use_blkid_wiping=1 configuration setting is set while LVM is not
compiled with blkid wiping support.
  Falling back to native LVM signature detection.
  Volume group "vg1" successfully created
linux-tjrh:~ # pvs
  PV         VG  Fmt  Attr PSize   PFree  
  /dev/loop1 vg1 lvm2 a--  996.00m 996.00m
  /dev/loop2 vg1 lvm2 a--  996.00m 996.00m
linux-tjrh:~ # vgs
  VG  #PV #LV #SN Attr   VSize VFree
  vg1   2   0   0 wz--n- 1.95g 1.95g
linux-tjrh:~ # lvcreate -n CacheDataLV -L 100M vg1 /dev/loop1
  allocation/use_blkid_wiping=1 configuration setting is set while LVM is not
compiled with blkid wiping support.
  Falling back to native LVM signature detection.
  Logical volume "CacheDataLV" created.
linux-tjrh:~ # lvs
  LV          VG  Attr       LSize   Pool Origin Data%  Meta%  Move Log
Cpy%Sync Convert
  CacheDataLV vg1 -wi-a----- 100.00m                                            
linux-tjrh:~ # lvs -o +cache_mode
  LV          VG  Attr       LSize   Pool Origin Data%  Meta%  Move Log
Cpy%Sync Convert CacheMode
  CacheDataLV vg1 -wi-a----- 100.00m 

it's my steps, is it suit for this issue?

-Zhilong