[CentOS] Centos 5.2 ,5.3 and GFS2

Ralph Angenendt ra+centos at br-online.de
Sat Mar 21 13:37:44 UTC 2009


Fabian Arrotin wrote:
> FM wrote:
> > Do you know whent Centos 5.3 will be ready ?
> > Can I install my GFS2 FS with centos 5.2 and then "simply" upgrade to 
> > 5.3 without reinstallation ?
> 
> No, you'll have manual intervention because now in 5.3 gfs2 module is 
> included by default in the 2.6.18-128.el5 kernel and isn't a external 
> rpm to install.

I had a file system loss yesterday with gfs2, so have fun with that module.

I have an iscsi target which is reachable via two paths, and every time I 
took away one of the two paths, gfs2 panicked on me:

Mar 20 16:31:08 kavring iscsid: connection2:0 is operational after recovery (44 attempts)
Mar 20 16:31:12 kavring multipathd: sdb: readsector0 checker reports path is down 
Mar 20 16:31:27 kavring last message repeated 3 times
Mar 20 16:31:32 kavring kernel: GFS2: fsid=on3-ruby-app:htmldata.0: fatal: invalid metadata block
Mar 20 16:31:32 kavring kernel: GFS2: fsid=on3-ruby-app:htmldata.0:   bh = 132517 (magic number)
Mar 20 16:31:32 kavring kernel: GFS2: fsid=on3-ruby-app:htmldata.0:   function = gfs2_meta_indirect_buffer, file = fs/gfs2/meta_io.c, line = 334
Mar 20 16:31:32 kavring kernel: GFS2: fsid=on3-ruby-app:htmldata.0: about to withdraw this file system
Mar 20 16:31:32 kavring kernel: GFS2: fsid=on3-ruby-app:htmldata.0: telling LM to withdraw
Mar 20 16:31:32 kavring multipathd: sdb: readsector0 checker reports path is down 
Mar 20 16:31:33 kavring kernel: GFS2: fsid=on3-ruby-app:htmldata.0: withdrawn

After that you need to gfs2_fsck the system. With gfs it works as designed, 
I can reach the target via the other path and the file system stays online 
*and* uncorrupted.

If you get different results, I'd be interested to know.

Ralph
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