You're trying to stuff ten hard disks into a PC's casing.
I am under th impression that he isn't using a standard PC-case; this sounds more like a HP-netserver with hot-swappable diskbays.
I would also look at other causes : is the SCSI-bus properly terminated. Are you using single-ended or differential SCSI? Are you're drives single-ended or differential? Is your termination single-ended or differential? I've had random SCSI-bus resets caused by slow tape-drives which were connected at the same end as fast SCSI-disks. Maybe it's just one faulty disk causing this behaviour.
Just a thought...

Frank van Gestel