[Linux-cluster] GFS and (missing) filesystem labels

[Riaan van Niekerk]

Jos Vos wrote:
> Hi,
> 
> It seems that you can not add a filesystem label to a GFS filesystem.
> 
> Especially when using iSCSI, it would be handy to have a method to be
> sure that you mount the right SCSI device, in case the device name
> has changed due to a failure of another (i)SCSI device.
> 
> Is there a good solution for this?
> 
> Thanks,
> 

hi Jos

a) use LVM. it does not care what the underlying physical volume names 
are, it will do the "right thing" w.r.t. volume groups and logical 
volumes names
b) your multipathing solution (e.g. EMC PowerPath with its persistent 
mapping functionality of paths to for example /dev/emcpowera1) might 
also solve this problem, if you want to avoid using LVM.

note - on SANs with multiple paths to the same LUN/partition, using 
labels to mount does not work (you will get an error message about 
duplicate labels), which is probably why the functionality is not there 
to begin with, and probably will not be either.

HTH
Riaan
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