BOUTKHIL--CAPGEMINI--, Mohamed
2009-Jan-13 16:58 UTC
[Ocfs2-users] mounted.ocfs2 -f return Unknown: Bad magic number in inode
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.
Sunil Mushran
2009-Jan-13 20:03 UTC
[Ocfs2-users] mounted.ocfs2 -f return Unknown: Bad magic number in inode
Appears you formatted the devices before you partitioned them. As the ocfs2 superblock is in the third block, it is not overwritten during partition. This version of mounted.ocfs2 does not handle this situation. Easiest fix is hand editing the signature using a binary editor. $ bvi -s 10240 /dev/sda Change the ocfs2 signature (OCFSV2) to something else. Changing one character is enough. BOUTKHIL--CAPGEMINI--, Mohamed wrote:> 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. > > > _______________________________________________ > Ocfs2-users mailing list > Ocfs2-users at oss.oracle.com > http://oss.oracle.com/mailman/listinfo/ocfs2-users >
BOUTKHIL--CAPGEMINI--, Mohamed
2009-Jan-15 09:40 UTC
[Ocfs2-users] mounted.ocfs2 -f return Unknown: Bad magic number in inode
Please forget my last question about mixed name of device mapper (dm-0 and
dm-4)
dm-0 is linked to sda and sdf
dm-4 is linked to sda1 and sdf1
So just the "bad magic" message disturbs me.
Mohamed.
Mohamed
BOUTKHIL--CAPGEMI
NI--/MAIL A
Sunil Mushran
15/01/2009 10:19 <sunil.mushran at oracle.com>
cc
Objet
Re: [Ocfs2-users] mounted.ocfs2 -f
return Unknown: Bad magic number in
inode(Document link: Mohamed
BOUTKHIL--CAPGEMINI--)
Thanks for your quick response.
I used bvi as you suggested and it works fine.
here is what I have now :
mounted.ocfs2 -f
Device FS Nodes
/dev/sda ocfs2 Unknown: Bad magic number in inode
/dev/sda1 ocfs2 pocrhel2, pocrhel1
/dev/sdf ocfs2 Unknown: Bad magic number in inode
/dev/sdf1 ocfs2 pocrhel2, pocrhel1
/dev/dm-0 ocfs2 Unknown: Bad magic number in inode
/dev/dm-4 ocfs2 pocrhel2, pocrhel1
Is it normal to have this message : "Unknown: Bad magic number in
inode" to
the device where an OCFS2 partition is built ?
And eventually, there is a switch between multipath. Normally dm-0 path is
linked to device sda and sdf (as multipath -ll command says). dm-4 is an
old one no more used
(in fact linked with sdb and sdg that I modified just before with bvi)
Mohamed.
Sunil Mushran
<sunil.mushran at or
acle.com> A
"BOUTKHIL--CAPGEMINI--,
Mohamed"
13/01/2009 21:03 <mohamed.boutkhil-capgemini at ca-leas
ing.fr>
cc
ocfs2-users at oss.oracle.com
Objet
Re: [Ocfs2-users] mounted.ocfs2 -f
return Unknown: Bad magic number in
inode
Appears you formatted the devices before you partitioned them.
As the ocfs2 superblock is in the third block, it is not overwritten
during partition. This version of mounted.ocfs2 does not handle
this situation.
Easiest fix is hand editing the signature using a binary editor.
$ bvi -s 10240 /dev/sda
Change the ocfs2 signature (OCFSV2) to something else. Changing
one character is enough.
BOUTKHIL--CAPGEMINI--, Mohamed wrote:> 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.
>
>
> _______________________________________________
> Ocfs2-users mailing list
> Ocfs2-users at oss.oracle.com
> http://oss.oracle.com/mailman/listinfo/ocfs2-users
>