[linux-lvm] raid10 to raid what? - convert

Stuart D. Gathman stuart at gathman.org
Wed Oct 18 13:33:30 UTC 2017

On Wed, 18 Oct 2017, Tanstaafl wrote:

>> and is not the same as raid1+0 (raid1 on top of raid0).
> Not according to everything I've ever read about it... for example:


>> But this is not certain as raid10 works perfectly well with 2 or 3
>> disks, including the redundancy.
> You must be talking about something else... RAID10 requires at least 4
> disks, and always an even number, although most RAID controllers support
> the designation of at least one hot spare (so it will auto-rebuild using
> the hot spare in the event of a failure). Been using this configuration
> in my 5 drive QNAP NAS's for along time.

Yep.  Not talking about raid1+0

Linux raid10 really ought to be a "standard" - and effectively is.
I use it whenever I can (with only 2 disks I use raid1 so I can alias
the legs as non-raid).

 	      Stuart D. Gathman <stuart at gathman.org>
"Confutatis maledictis, flamis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.

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