Erik Trimble wrote:
I also think I re-started this thread. Mea culpa.
The original comment from me was that I wasn't certain that the bug I
tripped over last year this time (a single-LUN zpool is declared corrupt
if the underlying LUN goes away, usually due to SAN issues) was fixed. I
I do not recall such bug. There had been a bunch of bugs related to
panics due to critical reads and writes failures, which were addressed
with introduction of 'failmode' property (and related fixes). Could you
please provide exact bug number?
did see that the host reset cycle issue with this was fixed, but I was
wondering if we're still concerned with "phantom" unrecoverable zpool
corruption when a quiet single-LUN zpool loses it's vdev.
Am I correct in hearing that we've fixed this issue? Or not?
Without exact bug number it is impossible to answer your question.
Cheers,
Victor
-Erik
On Fri, 2009-05-08 at 12:41 -0700, Richard Elling wrote:
Bob Friesenhahn wrote:
On Fri, 8 May 2009, Miles Nordin wrote:
It's frustrating to keep going in circles. Also I think advising
people they no longer need to avoid single-LUN SAN pools is a bad
idea. And blaming the SAN problems in silent bit-flips when it looks
pretty clearly that they actually lie elsewhere is dishonest and
contributes to a widening credibility gap.
Miles,
Maybe I was not paying attention or maybe my SPAM filter is
over-aggressive since I seem to have lost track of the discussion.
Could you remind us of the problem you are trying to solve? Has
anyone else but yourself encountered it?
If I may speak for Miles, he's pining for the forensics tool to replace
the current, manual method for attempting to recover a borked pool
by using old metadata. He's also concerned that people trust their
SAN too much. I agree, it is best if ZFS can manage data redundancy.
You will find similar recommendations in the appropriate docs.
-- richard
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