>>>>> "djm" == Darren J Moffat <[EMAIL PROTECTED]> writes:

   djm> If c0t6d0 and c0t7d0 both fail (ie both sides of the same
   djm> mirror vdev) then the pool will be unable to retrieve all the
   djm> data stored in it.

won't be able to retrieve ANY of the data stored on it.  It's correct
as you wrote it, but you almost make it sound like you could get some
data off the pool, and one might reasonably hope to, but you can't.

for xample,

1. zpool create pool mirror disk1 disk2

2. pax -rwpe /somewhere/else /pool

3. zpool add pool mirror disk3 disk4

   [don't write anything to the pool]

4. [disk3 and disk4 both die]

You've now lost everything you copied onto the pool in step 2.

so, if you type 'zpool add pool disk3 disk4' and forget the 'mirror',
your mistake isn't such a small one.  You have to quickly find disk5
and disk6 to attach.  (happened to me.  with <30day-old
disk3/disk4. at home with no backup.)

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