[Ocfs2-users] Local mount in 1.4?

[Sunil Mushran]

dmesg is empty because the fs is not being called.

Does "modprobe ocfs2" load the fs? lsmod shows the loaded modules.

After loading, do:
$ cat /proc/filesystems

This should show ocfs2 as a file system.

The error appears to indicate that the vfs did not find ocfs2.
One reason could be that the module was not loaded. But since the
nodemanager appears to have been loaded, means that the rpm was
installed. So I am a bit puzzled. That this works in 1.2 indicates
that this problem could be specific to the 1.4 package you are
installing.


Bruce MacDonald wrote:
> Hi Sunil,
>
> Thanks again for your help.  Still nothing in dmesg.
>
> I did get 2 trace files, which I'm sending you separately.
>
> Cheers,
>                    Bruce
>
> Sunil Mushran wrote:
>> Do:
>>
>> $ dmesg -n8
>> $ debugfs.ocfs2 -l ENTRY EXIT SUPER allow
>> $ strace -ff -o /tmp/mm mount /dev/sdb1 /u01
>> $ debugfs.ocfs2 -l ENTRY EXIT deny SUPER off
>>
>> dmesg may be set up to ignore KERN_INFO messages. Let's
>> explicitly enable that. Also zip up the straces /tmp/mm.*.
>>
>>
>> Bruce MacDonald wrote:
>>> Hi Sunil,
>>>
>>> OK, I've done a fresh install to test this.  I'm using Sun 
>>> VirtualBox by the way.
>>>
>>> Here's what I do:
>>>
>>> [root at OELTEST ~]# mkfs.ocfs2 -T datafiles -N 1 -M local -L "Data" 
>>> /dev/sdb1
>>> mkfs.ocfs2 1.4.1
>>> Filesystem Type of datafiles
>>> Filesystem label=Data
>>> Block size=4096 (bits=12)
>>> Cluster size=262144 (bits=18)
>>> Volume size=85899083776 (327679 clusters) (20971456 blocks)
>>> 11 cluster groups (tail covers 5119 clusters, rest cover 32256 
>>> clusters)
>>> Journal size=33554432
>>> Initial number of node slots: 1
>>> Creating bitmaps: done
>>> Initializing superblock: done
>>> Writing system files: done
>>> Writing superblock: done
>>> Writing backup superblock: 4 block(s)
>>> Formatting Journals: done
>>> Formatting slot map: done
>>> Writing lost+found: done
>>> mkfs.ocfs2 successful
>>>
>>> [root at OELTEST ~]# mkdir /u01
>>> [root at OELTEST ~]# mount /dev/sdb1 /u01
>>> mount.ocfs2: No such device while mounting /dev/sdb1 on /u01. Check 
>>> 'dmesg' for more information on this error.
>>>
>>> I can't see ANY errors in /var/log/messages, even with tracing 
>>> turned on!
>>>
>>> [root at OELTEST ~]# date
>>> Thu Feb 12 00:02:39 PST 2009
>>> [root at OELTEST ~]# tail -3 /var/log/messages
>>> Feb 11 23:37:13 OELTEST kernel: sdb: Write Protect is off
>>> Feb 11 23:37:13 OELTEST kernel: SCSI device sdb: drive cache: write 
>>> back
>>> Feb 11 23:37:13 OELTEST kernel:  sdb: sdb1
>>> [root at OELTEST ~]# debugfs.ocfs2 -l ENTRY EXIT SUPER allow;
>>> [root at OELTEST ~]# mount /dev/sdb1 /u01
>>> mount.ocfs2: No such device while mounting /dev/sdb1 on /u01. Check 
>>> 'dmesg' for more information on this error.
>>> [root at OELTEST ~]# debugfs.ocfs2 -l ENTRY EXIT deny SUPER off;
>>> [root at OELTEST ~]# tail -3 /var/log/messages
>>> Feb 11 23:37:13 OELTEST kernel: sdb: Write Protect is off
>>> Feb 11 23:37:13 OELTEST kernel: SCSI device sdb: drive cache: write 
>>> back
>>> Feb 11 23:37:13 OELTEST kernel:  sdb: sdb1
>>>
>>> Any ideas?  As I said before, this works fine with the version of 
>>> OCFS2 1.2 that comes on the DVD.
>>>
>>> Cheers,
>>>                Bruce
>>>
>>> Sunil Mushran wrote:
>>>> I hope the tools are 1.4.
>>>>
>>>> Enable some tracing. Do:
>>>> $ debugfs.ocfs2 -l ENTRY EXIT SUPER allow;
>>>> $ mount ...
>>>> $ debugfs.ocfs2 -l ENTRY EXIT deny SUPER off;
>>>>
>>>> The logs will be in /var/log/messages.
>>>>
>>>> Bruce MacDonald wrote:
>>>>> Thanks for replying Sunil.  No, nothing in dmesg.
>>>>>
>>>>> On 9-Feb-09, at 13:41, Sunil Mushran <sunil.mushran at oracle.com> 
>>>>> wrote:
>>>>>
>>>>>> Bruce MacDonald wrote:
>>>>>>> I'm playing around with OCFS2 as a local filesystem, as an 
>>>>>>> alternative to using XFS for a multi-terabyte database.  Using 
>>>>>>> OEL 5.2 from the demo DVD, I download the latest OCFS2 1.4 
>>>>>>> packages and format the filesystem, but when I try to mount it, 
>>>>>>> I get a "file not found" error, as if "/u01" doesn't exist 
>>>>>>> (which it does).
>>>>>>>
>>>>>>> If I do the same thing but install OCFS2 1.2 from the DVD, this 
>>>>>>> works without problem.
>>>>>>>
>>>>>>> Should 1.4 work as a local filesystem, or am I missing something?
>>>>>>
>>>>>> Support for local mounts is in OCFS2 1.4. Does dmesg say anything?
>>>>
>>>>
>>
>>
> ------------------------------------------------------------------------
>
> _______________________________________________
> Ocfs2-users mailing list
> Ocfs2-users at oss.oracle.com
> http://oss.oracle.com/mailman/listinfo/ocfs2-users