[Ocfs2-users] Problem w/ OCFS2 on RHEL5

[Sunil Mushran]

Disable selinux.
In /etc/selinux/config, add make SELINUX=disabled and reboot.

John Twyman wrote:
> Hi folks,
>
> I've just started looking into ocfs2 as a means of allowing shared 
> storage on our iSCSI raid box for two of our servers. My intention is 
> to use linux-ha to provide highly available services (eg. samba) with 
> ocfs2 guaranteeing safe shared access to disk space. It seems 
> straightforward but I've run into a problem on one of the two servers.
>
> Both servers are running RHEL 5 with the 2.6.18-53.1.4.el5 kernel. 
> They're identical in terms of hardware and iSCSI is working properly 
> on both. I've downloaded and installed the three ocfs2 RPMS (ocfs2, 
> ocfs2-tools and ocfs2console) successfully.
>
> Following the instructions in the User's Guide I then type the following:
>
> [root at host1 OCFS2]# /etc/init.d/o2cb status
> Module "configfs": Not loaded
> Filesystem "configfs": Not mounted
> Module "ocfs2_nodemanager": Not loaded
> Module "ocfs2_dlm": Not loaded
> Module "ocfs2_dlmfs": Not loaded
> Filesystem "ocfs2_dlmfs": Not mounted
>
> [root at host1 OCFS2]# /etc/init.d/o2cb load
> Loading module "configfs": OK
> Mounting configfs filesystem at /sys/kernel/config: OK
> Loading module "ocfs2_nodemanager": OK
> Loading module "ocfs2_dlm": OK
> Loading module "ocfs2_dlmfs": OK
> Mounting ocfs2_dlmfs filesystem at /dlm: OK
>
> All looking good but I run into problems on host2:
>
> [root at host2 OCFS2]# /etc/init.d/o2cb status
> Module "configfs": Not loaded
> Filesystem "configfs": Not mounted
> Module "ocfs2_nodemanager": Not loaded
> Module "ocfs2_dlm": Not loaded
> Module "ocfs2_dlmfs": Not loaded
> Filesystem "ocfs2_dlmfs": Not mounted
> [root at host2 OCFS2]# /etc/init.d/o2cb load
> Loading module "configfs": OK
> Mounting configfs filesystem at /sys/kernel/config: OK
> Loading module "ocfs2_nodemanager": OK
> Loading module "ocfs2_dlm": OK
> Loading module "ocfs2_dlmfs": OK
> Mounting ocfs2_dlmfs filesystem at /dlm: mount: block device 
> ocfs2_dlmfs is write-protected, mounting read-only
> mount: cannot mount block device ocfs2_dlmfs read-only
> Unable to mount ocfs2_dlmfs filesystem
> Failed
>
> This, I'm afraid, leaves me stumped. I'm not sure how best to proceed.
>
> I've updated the RHEL5 kernel to 2.6.18-53.1.6.el5 and built rpms from 
> source for ocfs2 but to no avail. I get exactly the same problem on 
> the same host.
>
> Does anyone have any ideas as to how I might proceed? Any help would 
> be greatly appreciated.
>
> Cheers,
> John
>