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Old 07-24-2019, 02:15 PM   #26
Curious.George
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Join Date: Nov 2011
Posts: 2,302
Default Re: RAID5 failure: 2 bad HDD's at the same time

Quote:
Originally Posted by CapLeaker View Post
This is the idea I have for later. I am going to upgrade sooner or later my NAS. So I going from a 4 bay to an 8 bay NAS. Run a 6 drive RAID 6 and with the other 2 bays two large capacity HDDs on JBOD.
I'd still question the appropriateness of ANY RAID. Remember, all it provides is AVAILABILITY, not DURABILITY. The extra drives might be better used in another configuration (or even "kept cold")

I've set up RAID on my SAN (and only on my SAN) because it essentially provides "C:" for the many virtual machines that are stored on it. When I activate a VM, I don't want to risk the VM hiccuping because of a disk error (e.g., a corrupt binary or otherwise unreadable file). But, I don't rely on the RAID to preserve my data any longer than that particular "session" (if the array crashes just as I log off, I don't care -- I'll see which drive(s) have failed, replace them and then reinitialize their content from my archives).
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