Raid 5 vs Raid 6 - Corsa Sport - for Vauxhall and Opel Corsa B, Corsa C and Corsa D

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Bart

Member

Registered: 19th Aug 02
Location: Midsomer Norton, Bristol Avon
User status: Offline

17th Sep 08 at 11:33

in laemon terms, whats the difference?

My NAS is running Raid5, I have 4 hard drives, if one fails it carries on with 3.
to the best of my knowlege, 3 hard drives are used, and the 4th takes snapshots of each one and replaces the broke drive. (not the correct terminology, but i think thats right).

What the difference between that and raid6?
Im told it has extra storage security, and my NAS now supports raid6.

Rob_Quads

Member

Registered: 29th Mar 01
Location: southampton
User status: Offline

17th Sep 08 at 11:46

raid6 means you can loose 2 drives without loosing data
BUT it means you also have n-2 in terms of capacity i.e in your setup

RAID5 = 1 fail out of 4 - capacity = 3x drive size
RAID6 - 2 fail out of 4 - capavity = 2x drive size

Bart

Member

Registered: 19th Aug 02
Location: Midsomer Norton, Bristol Avon
User status: Offline

17th Sep 08 at 13:42

splended.
Great idea, but I dont think i want 2x capacity