On Mon, Jul 30, 2012 at 9:38 AM, Roy Sigurd Karlsbakk <r...@karlsbakk.net> 
>> > Also keep in mind that if you have an SLOG (ZIL on a separate
>> > device), and then lose this SLOG (disk crash etc), you will probably
>> > lose the pool. So if you want/need SLOG, you probably want two of
>> > them in a mirror…
>> That's only true on older versions of ZFS. ZFSv19 (or 20?) includes
>> the ability to import a pool with a failed/missing log device. You
>> lose any data that is in the log and not in the pool, but the pool is
>> importable.
> Are you sure? I booted this v28 pool a couple of months back, and found it 
> didn't recognize its pool, apparently because of a missing SLOG. It turned 
> out the cache shelf was disconnected, after re-connecting it, things worked 
> as planned. I didn't try to force a new import, though, but it didn't boot up 
> normally, and told me it couldn't import its pool due to lack of SLOG devices.

Positive.  :)  I tested it with ZFSv28 on FreeBSD 9-STABLE a month or
two ago.  See the updated man page for zpool, especially the bit about
"import -m".  :)

Freddie Cash
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