NetRAID 4M & MSCS Quorum RAID

[Francesco Tamba]

Hi,

recently HP made an update to their "installation an configuration guide"
for their SCSI controller certified for MSCS, NetRAID 4M.
The first release of this guide was on march 2001 without any remarkable
issue. At the begin of November they made this update:
"HP recommends creating a fault-tolerant RAID type, such as RAID-5 for the
shared quorum drive. RAID-1 mirrors are NOT recommended for the shared
quorum when using the HP NetRAID-4M controller".

Now, is there anybody that also use HP hardware for MSCS and noticed this?
Any comments? I can't see any damn good technical reason for this.

Thanks
Francesco