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XServe Raid Question
It’s been a long time since I set up a RAID 50 using the RAID Admin. I am creating a RAID50 using 8 500G drives. My problem is when I stripped each set of 4 drives to RAID5, I get an Array size of 1.36TB. That seems very low.
What should I expect and what might I be doing wrong.
Thanks in advance for the info.
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3 Replies
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What do you expect – 2 Terabytes ? The RAID data has to get compressed to somewhere !
4 Terabytes becomes 2.85 TB on modern RAID 5 arrays
6 Terabytes becomes 4.85 TB on modern RAID 5 arrays
8 Terabytes becomes 6.8 TB on modern RAID 5 arrays
12 Terabytes becomes 9.75 TB on modern RAID 5 arrays.Sorry – I don’t have the facts for 2 Terabytes.
Bob Zelin
ps – the Xserve RAID is an old dog. You would be better off with some new internal SATA drives stripped RAID 0. You will get the same performance, and even with your RAID 5, those old Hitachi PATA drives will fail long before a modern SATA II drive.bob Zelin
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Thanks Bob, like I said it’s been awhile. Yeah I know the drives are out dated, but they do the job and I’ve never had a problem. Upgraded drives are one of the next upgrades I was planning on doing.
Thanks
Craig Hotti
Pen to Pixels, Inc.
Glendale, CA -
If you’re looking to update the drives in your Xserve Raid you better act fast. PATA drive are becoming harder to find since only 1 manufacture is making them nowadays. We update our Xraid from 250 to 500 drives and had the hardest time trying to find enough PATAs to fill the sleds.
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