[linux-lvm] segmentation fault when creating snapshot volume/PVa

[Premysl Vaclavik]

Hi,

I have a following problem with LVM2.

When I try to create snapshot logical volume, command crashes with
segmentation fault.

Logic volume is somehow created, but I am not able to mount it, because
it complains that the device

does not exist.

 

>vgdisplay vol0                         # shows hom many PEs are
available

.

.

Free PE/ Size               6400 / 100.00 GB

>lvcreate -L 1280 -c 1024k -s -n vol0.1 /dev/vol0/prj

# produces:

Segmentation fault

>lvdisplay

  --- Logical volume ---

  LV Name                /dev/vol0/prj

  VG Name                vol0

  LV UUID                biQ0ny-Wz48-vOUS-tDsR-8ynO-GDS2-oUqpt9

  LV Write Access        read/write

  LV snapshot status     source of

                         /dev/vol0/vol0.1 [active]

  LV Status              suspended

  # open                 2

  LV Size                458.70 GB

  Current LE             29357

  Segments               1

  Allocation             inherit

  Read ahead sectors     0

  Block device           253:0

   

  --- Logical volume ---

  LV Name                /dev/vol0/vol0.1

  VG Name                vol0

  LV UUID                SZQsRU-pRAl-ZiLZ-BJ1X-7kGk-fBce-8vLMKa

  LV Write Access        read/write

  LV snapshot status     active destination for /dev/vol0/prj

  LV Status              suspended

  # open                 0

  LV Size                458.70 GB

  Current LE             29357

  Segments               1

  Snapshot chunk size    1.00 MB

  Allocated to snapshot  0.16% 

  Allocation             inherit

  Read ahead sectors     0

  Block device           253:14

 

#So, it looks like the logical snapshot volume was created, BUT I am not
able to mount it

>mount /dev/vol0/vol0.1 /mnt

Mount: special device /dev/vol0/vol0.1 does not exist

 

#Well, I have removed the snapshot volume and created just another
logical volume in the same group

>lvremove -f /dev/vol/vol0.1

  Logical volume "vol0.1" successfully removed

>lvcreate -L 1280 -n vol0.1 vol0

  Logical volume "vol0.1" created

>mkfs.ext3 /dev/vol/vol0.1

>mount -t ext3 -o ro /dev/vol/vol0.1 /export/prj.1

# mounts the system

>df -k

.

.

/dev/mapper/vol0-vol0.1  .....

 

What am I doing wrong ?

Any hints to follow ?

 

I have following configuration:

SuSE 9.2 ( 2.6.8-24-smp )

3ware Raid controller

lvm2-2.00.25-2

 

best regards

premysl.vaclavik at ondemand.co.at

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