[linux-lvm] how to recover lvm after OS re-install

Hello,

I had to re-install my OS from scratch after a software problem (perl).

Now struggling to recover the logical volume I had before the server crash. It is full of files, data etc. OS was not (and is not) on that hard disk. That is a separate data partition (actually a hard raid array). There is no any hard disk failure. And, I didn't formatted this disk during re-install OS. So, I think, the data should be there untouched.

What I did:
#pvcreate /dev/sdc
#vgcreate -s 32M raid_vg0 /dev/sdc (I used the same PE size as before)
#lvcreate -l 23839 -n raid_lv0 raid_vg0 (maximum extents from vgdisplay)

Unfortunately, it complains when mounting raid_lv0:
#mount: you must specify the filesystem type

Obviously, if I format it, there will be no problem in mounting, but will lose all the data on it.

Is there a way to mount this lv without losing data? Or, should I forget about all the data on that disk?

Please help!

Best wishes,
Mufit

Some info:
[root server dev]# pvdisplay
--- Physical volume ---
PV Name               /dev/sdc
VG Name               raid_vg0
PV Size               745.00 GB / not usable 32.00 MB
Allocatable           yes (but full)
PE Size (KByte)       32768
Total PE              23839
Free PE               0
Allocated PE          23839
PV UUID               2Xd3p7-KlaX-SIbW-vCKH-uJ73-Ldeh-QG0P9r

[root server dev]# vgdisplay
--- Volume group ---
VG Name               raid_vg0
System ID
Format                lvm2
Metadata Areas        1
Metadata Sequence No 2
VG Access             read/write
VG Status             resizable
MAX LV                0
Cur LV                1
Open LV               0
Max PV                0
Cur PV                1
Act PV                1
VG Size               744.97 GB
PE Size               32.00 MB
Total PE              23839
Alloc PE / Size       23839 / 744.97 GB
Free PE / Size       0 / 0
VG UUID               MUz02m-JWYb-f2gP-8PBc-0y2I-a1y8-sZfrOx

[root server dev]# lvdisplay
--- Logical volume ---
LV Name                /dev/raid_vg0/raid_lv0
VG Name                raid_vg0
LV UUID                2yoy12-qASz-qdmy-AcB4-iaG3-XGN8-mwv9VS
LV Write Access        read/write
LV Status              available
# open                 0
LV Size                744.97 GB
Current LE             23839
Segments               1
Allocation             inherit
Read ahead sectors     0
Block device           253:0