RAID, Vinum and different disksizes

Joshua Oreman oremanj at
Mon Jun 9 10:58:49 PDT 2003

On Mon, Jun 09, 2003 at 05:10:37PM +0200 or thereabouts, freeBSD seemed to write:
> I have three 120GB disks and one 170GB disk. The first three is forming
> a raid-5 volume using Vinum and the last one is just fooling around
> without any purpose.
> Can I add this 170GB to the raid5 volume in any way at all? I do realise
> that I will loose 50Gb, but that's better than not using it at all.

Sorry, no.
On the other hand, if the first three were a concat plex, you *could* do it,
and you wouldn't even lose 50gb!
Your best bet is either:
a) mount the 170gb on /usr2 or something
b) backup the data on the raid5, restore to a concat

-- Josh

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