Curt Mills wrote:
On Thu, 29 Oct 2009, ML wrote:
My question is about initial setup. The 4 x 1TB drives. How to set this up for I have some protection?
RAID 0+1? (striped + mirrored) I would end up with 2TB useable space.
RAID 5? so what one is a hot spare? 3TB useable space?
What about striping the 4 1TB and mirroring that to a 4 x 1tb External drive enclosure?
Plan for drives going out but keeping the site operational. Also remember that RAID isn't a backup.
RAID 5 is enticing because you get more usable space out of your drives, but you have to be sure you'll only lose one drive at a time and can get a replacement drive in there and sync'ed up before you lose a 2nd one... If the drives were made by the same manufacturer and were bought at about the same time you might easily lose 2 or more, blowing up your array.
Right. The problem with 1TB drives (and really, any modern drive with decent capacity) is that you're vulnerable until that array finishes rebuilding-- a process that's taking longer and longer.
I'd go with the RAID10 solution that someone previously posited. By the time you outgrow that, you should really plan for a SAN/NAS solution anyway...
-- Corey / KB1JWQ