[QUOTE=summitflier;14441]Hostbased is usually a RAID controller in your PC/Server that is controlling the local disks (also in your PC).
(This can be hardware or software based)
Storage based RAID is normally on a NAS or SAN, disk array. The RAID controllers live on the disk array, not on your PC/Server.
A major disadvantage of host-based vs storage based, is redundancy. You probably only have 1 single RAID controller (in any)
in your PC, now sometimes these can be a PCI card, so you could install another one in another PCI slot, but even then you can’t
usually use them to control the same group of RAID disks.
If you use HBAs to do fiber connections back to SAN array (usually these go through a fiber switch (like an EMC/Brocade for example)
the big advantage is you can either do active-active and theorectically double your disk I/O bandwidth, or you can do active-passive,
that way if one of your HBAs fail, you can still up on the other (fail-over) HBA.
I’m over-simplifying this down to a few paragraphs. But from what I gather, it’s talking about a SAN (or possibly NAS) disk array,
rather than a group of disks controlled by a RAID controller physically in your server.[/QUOTE]
Understand, thanks a lot!