[Ocfs2-users] mounted.ocfs2 -f return Unknown: Bad magic number in inode

[BOUTKHIL--CAPGEMINI--, Mohamed]

Hello,

I have installed ocfs2 without problem and use it for a RAC10gR2.
Only Clusterware files are ocfs2 type.
multipath is also used.
When I issue : mounted.ocfs2 -f
I have a strange result:

Device                FS     Nodes
/dev/sda              ocfs2  Unknown: Bad magic number in inode
/dev/sda1             ocfs2  pocrhel2, pocrhel1
/dev/sdb              ocfs2  Not mounted
/dev/sdf              ocfs2  Unknown: Bad magic number in inode
/dev/sdf1             ocfs2  pocrhel2, pocrhel1
/dev/sdg              ocfs2  Not mounted
/dev/dm-0             ocfs2  Unknown: Bad magic number in inode
/dev/dm-4             ocfs2  pocrhel2, pocrhel1

Devices: sda and sdf  are different paths to the same LUN. dm-0 is the
multipath as stated by the following command:
 multipath -ll
ASM_DISK_4 (360060e80056583000000658300004064) dm-3 HITACHI,OPEN-V
[size=9.0G][features=0][hwhandler=0]
\_ round-robin 0 [prio=2][active]
 \_ 0:0:1:4 sde 8:64  [active][ready]
 \_ 1:0:1:4 sdj 8:144 [active][ready]
ASM_DISK_3 (360060e80056583000000658300004063) dm-2 HITACHI,OPEN-V
[size=9.0G][features=0][hwhandler=0]
\_ round-robin 0 [prio=2][active]
 \_ 0:0:1:3 sdd 8:48  [active][ready]
 \_ 1:0:1:3 sdi 8:128 [active][ready]
ASM_DISK_2 (360060e80056583000000658300004062) dm-1 HITACHI,OPEN-V
[size=9.0G][features=0][hwhandler=0]
\_ round-robin 0 [prio=2][active]
 \_ 0:0:1:2 sdc 8:32  [active][ready]
 \_ 1:0:1:2 sdh 8:112 [active][ready]
CRS_DISK (360060e80056583000000658300004060) dm-0 HITACHI,OPEN-V
[size=9.0G][features=0][hwhandler=0]
\_ round-robin 0 [prio=2][active]
 \_ 0:0:1:0 sda 8:0   [active][ready]
 \_ 1:0:1:0 sdf 8:80  [active][ready]

I have some questions:
1- The message "Unknown: Bad magic number in inode", what does it mean ?
Can I discard it ?
2- sdb and sdg devices were an ocfs2 volume but not anymore. Why it is
listed here ?
3- It seems there is a mismatch between dm-0 and dm-4. dm-0 must be the
right one. dm-4 is an old multipath removed.. Is this info is reliable ?

Does anyone can help me on this weird behavior?

Thanks in advance,


Mohamed.