[Linux-cluster] can not mount GFS, "no such device"

Diamond Li diamondiona at gmail.com
Wed Dec 30 07:14:59 UTC 2009

Since I have no idea about you guys OS version. From my version,
RH5.4, system is using
gfs2 kernel module, so I guess I have to use mkfs.gfs2 to create gfs2
file system.  However, I didn't see any RH5.4 document pointing
this(or I missed it out).

If you guys have the same configuration, that means GFS tools is
unstable because the only change I did is using different command.

Same as the problem I encountered using lvcreate, on the first day it
always hangs up, but in next morning, it executed successfully without
any changes. It sounds impossible but this is the truth.

[root at wplccdlvm445 gfs]# lsmod |grep -i gfs
gfs2                  347529  2 lock_dlm
configfs               28753  2 dlm

On Wed, Dec 30, 2009 at 3:01 PM, Ian Hayes <cthulhucalling at gmail.com> wrote:
> On Tue, Dec 29, 2009 at 10:44 PM, Gordan Bobic <gordan at bobich.net> wrote:
>> Diamond Li wrote:
>>> after I use mkfs.gfs2, it works. However, I did not see any document
>>> to mention this command,  always gfs_mkfs.
>> I'm not sure what you're doing differntly (you omitted the FS creation
>> command in your previous email), but this works just fine for me:
>> gfs_mkfs -j 2 -p lock_dlm -t test:root /dev/hdb
>> mount /mnt/gfs
>> The fstab line is:
>> /dev/hdb   /mnt/gfs   gfs   defaults,noatime,nodiratime   0 0
> I had a similar problem in my Redhat Clustering and Storage Management class
> the other week. I believe the problem was with a couple of mistakes I made
> while playing around in one of the labs. I know once it was because I was
> trying to mount the block device instead of the logical volume.
>> in my humble opnion, redhat has a log way to provide real enterprise
>> solution, both from software quality and documentation.
>> There doesn't seem to be enough in this thread to persuade me that the
>> cause of problems isn't user error. :)
> IIRC, gfs2 is still under development and considered experimental. There's
> tons of documentation for production-quality GFS and I imagine once gfs2
> gets more mainlined, this will be the case also.
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