software RAID 1 w/3 Drives

[der.hans]

Am 21. Jul, 2007 schwätzte Randy Melder so:

> If a Linux RAID 1 set is created with 3 drives, is it the same volume
> mirrored on all three drives? If not, how does RAID 1 work with more
> than 2 drives?

Most likely the 3rd disk is a hot spare that will be activated if one of
the disks in the pair goes down.

http://www.tldp.org/HOWTO/Software-RAID-HOWTO-1.html#ss1.4

RAID 1 requires pairs of disks for the mirroring.

Looking at the information for your RAID setup should tell you how each of
the 3 disks is configured.

ciao,

der.hans
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