Bill,
Oh, I know. I don't believe its any mistruth, because, they did give you that amount of storage, in theory. In theory being the little thing that reminds you that an 80GB disk won't arrive with 80GB capacity. :)
Obviously, vendors will want to show raw numbers, as they should. My comment wasn't really aimed at the hardware vendors, implying that maybe they were stating an untruth, it was more aimed towards anyone considering purchasing a RAID unit. Most of us know and realize the disk space hit you take with RAID 5, but some of us don't and some of us just forget. I know that I got so used to saying "3.5TB RAID" that I almost was dissapointed when I got a mere 1.4TB per controller in my new server.
Guess it just means that I'll have to order a Qlogic switch and a 5.6TB RAID to complement my 3.5! ;)
Michael Dhaliwal
Apple Certified: ACHDS, ACTC
Apple Product Professional
Loyola Press
3441 N. Ashland Ave.
Chicago, IL 60657
"If IT was easy
Everyone would do IT"
True. But to be fair, nearly all storage vendors report capacity as
"raw" storage. Meaning, rated drive size times the number of drives.
This assumes RAID 0, which nobody would actually do on that much data
(well, actually I know of a few who want it that way for a "scratch"
drive). So with RAID 5, you lose 2 drives of capacity (= 800 GB
total), and then you have that "hard drive math" think, due to
differing interpretations of 1000, between hard drive makers and the
computers themselves ;-)
The new "5.6 TB" units, formatted as RAID 5, have about 4.5 TB of total
capacity (2.25 GB per side). Note most enterprise storage buyers
actually *prefer* the raw capacity numbers (rather than "you'll get
this much as RAID 5") because that's how they make meaningful
comparisons on cost/GB.
So it's not "shysterism" or mis-truth on Apple's part, it's just
reporting the numbers the same way everyone in the field (EMC, IBM,
NetApp, etc.) does.
Cheers,
-Bill
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