[NTLUG:Discuss] High Availability Storage Solution

[George Lass]

Greetings,

I am trying to figure out an inexpensive storage solution to support the needs
of 2 different high availability clusters.  One of the HA clusters will be 
running
Suse Enterprise Linux 11, and the other CentOS 5.x. I have been reading up
on CentOS clustering, and GFS and GNBD with directly connected storage:

http://www.centos.org/docs/5/html/5.2/Cluster_Suite_Overview/s2-ov-economy-CSO.html#fig-gfs-gnbd-storage-CSO



and it might fit the bill, but I'm unclear what would happen if one if the GNBD 
servers
fails and I no longer have access to its local disk.  In particular, I'm 
wondering
if data written to one of the GNBD servers is "mirrored" to the other servers so
that all of my application data is still accessible?

Does anyone out there have any experience with this kind of set up, or know
of a storage solution that would fit my needs?

Thanks,

George Lass