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January 21st, 2004 20:00
Raid 5 - How many disks required?
Here is a simple question for someone, how many disks do you need for a redundant Raid 5 configuration? (Minimum required = 3 or 4)
I have a PE 2550, Perc3di.
From: Confused
MaxStemple
6 Posts
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January 21st, 2004 21:00
slightlyconfuse
2 Posts
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January 21st, 2004 22:00
So with the 3 disks, with only a single disk failure in any of the 3 the system should maintain operation with only degraded disk performance?
What about an online spare? What would it's purpose serve in this scenario?
Thanks for your reply....
aeubank
52 Posts
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January 21st, 2004 23:00
Online spare would reconfigure the RAID and mark the drive that has problems as bad..
One thing to keep in mind is the math involved in a RAID (if you didn't already know). For a 3 disk RAID you lose the equivalent of one disk in a RAID 5 for the striping and parity..
DELL-Mark A
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2.5K Posts
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January 22nd, 2004 15:00
Hi,
This document may help explaining some of the raid theory:
http://docs.us.dell.com/docs/storage/Raid/RAIDbk0.pdf
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