What is "2LUN" mode in connection with RAID?

Posted by naxa on Super User See other posts from Super User or by naxa
Published on 2014-04-02T10:09:25Z Indexed on 2014/06/05 15:28 UTC
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hard-drive

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raid

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terminology

I've came across RAID products that also list JBOD (just a bunch of disks) mode and 2LUN mode. What the heck is 2LUN mode?

I could not find a description; the closest thing seems to be LUN 'logical unit number' but I don't get the 2LUN thing.

UPDATE 1

This is what Wikipedia has to say about JBOD:

JBOD (derived from "just a bunch of disks"): an architecture involving multiple hard drives, while making them accessible either as independent hard drives, or as a combined (spanned) single logical volume with no actual RAID functionality.

So JBOD can actually mean two different (albeit related) things.

Answer of Guest says 2LUN means no spanning.

Does this suggest that 2LUN would simply mean the JBOD-variant with no span?

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