A seperate ZFS question

Steve O'Hara-Smith steve at sohara.org
Fri Apr 28 15:08:46 UTC 2017

On Fri, 28 Apr 2017 15:52:59 +0200 (CEST)
Trond Endrestøl <Trond.Endrestol at fagskolen.gjovik.no> wrote:

> On Fri, 28 Apr 2017 14:14+0100, Paul Macdonald wrote:
> > 
> > I fat fingered adding a cache drive and was unable to remove the SSD
> > cache drive (ada2)
> First, you have gpt/zfs0 and ada1p3 in a mirrored configuration. Next, 
> you have ada2 striped (RAID 0) to the first pair of mirrors. This is a 
> very weird "RAID 1 + 0" combo. Guess what will happen when you lose 
> ada2!
> Maybe you should describe what you wanted to happen in the first 
> place.

	He did, ada2 is supposed to be a cache drive, now it's a stripe.

> I suggest you make good backups of this pool, destroy it, recreate it 
> properly, and restore the missing data.

	Agreed, you can't undo adding a stripe.

Steve O'Hara-Smith <steve at sohara.org>

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