Env:
Win2000 Adv Server SP4
SQL2000 SP4

First, you need to fix you SAN issues, with or without clustering SQL really
likes to have its disks online at all times.

Have you separated your Databases and Transaction Log files? RAID 1 or 10
for the Logs. Raid 5 or 10 for the Databases. Quorum & MSDTC (if required)
on its own disk subsystems of 1 GB in size.

Cheers,

Rod

MVP - Windows Server - Clustering
http://www.nw-america.com - Clustering Website
http://msmvps.com/clustering - Blog
http://www.clusterhelp.com - Cluster Training

That's not an upgrade, it is a reconfiguration.  They do completely
different things.  By RAID 1+0 do you mean a stripe of mirrors or a mirror
of stripes?

In either case, the answer is, I don't know.  RAID5 gives particular levels
of redundancy while incurring a performance impact for certain types of I/O
patterns.  A mirror of stripes gives equivalent redundancy to RAID5 without
having quite a much of a performance impact on certain types of I/O
patterns.  A stripe of mirrors gives much greater redundancy than the other
two and generally better performance as well.  But, if you are saturating
the I/O channel or stuffing all of your data on a tiny subset of the drives
in the SAN, it really isn't going to matter very much.  The recommendations
also vary depending upon whether you have an access pattern that looks like
"tradional OLTP", "traditional DW", or a mix of the two.

Regardless of the performance characteristics, neither one is going to be
more stable than the other in your case.  If the SAN drives disconnect, it
doesn't matter if it is a cluster or a standalone SQL Server, it isn't going
to like it.  You have to fix the errors on your SAN that are causing the
disconnects first.  If those aren't fixed, there isn't anything you are
going to be able to do to make the system stable.