On Wed, Jun 30, 2010 at 09:47:15AM -0700, Edward Ned Harvey wrote: > > From: Arne Jansen [mailto:sensi...@gmx.net] > > > > Edward Ned Harvey wrote: > > > Due to recent experiences, and discussion on this list, my colleague > > and > > > I performed some tests: > > > > > > Using solaris 10, fully upgraded. (zpool 15 is latest, which does > > not > > > have log device removal that was introduced in zpool 19) In any way > > > possible, you lose an unmirrored log device, and the OS will crash, > > and > > > the whole zpool is permanently gone, even after reboots. > > > > > > > I'm a bit confused. I tried hard, but haven't been able to reproduce > > this > > using Sol10U8. I have a mirrored slog device. While putting it > > under load doing synchronous file creations, we pulled the power cords > > and unplugged the slog devices. After powering on zfs imported the > > pool, > > but prompted to acknowledge the missing slog devices with zpool clear. > > After that the pool was accessible again. That's exactly how it should > > be. > > Very interesting. I did this test some months ago, so I may not recall the > relevant details, but here are the details I do remember: > > I don't recall if I did this test on osol2009.06, or sol10. > > In Sol10u6 (and I think Sol10u8) the default zpool version is 10, but if you > apply all your patches, then 15 becomes available. I am sure that I've > never upgraded any of my sol10 zpools higher than 10. So it could be that > an older zpool version might exhibit the problem, and you might be using a > newer version. > > In osol2009.06, IIRC, the default is zpool 14, and if you upgrade fully, > you'll get to something around 24. So again, it's possible the bad behavior > went away in zpool 15, or any other number from 11 to 15. > > I'll leave it there for now. If that doesn't shed any light, I'll try to > dust out some more of my mental cobwebs.
Anyone else done any testing with zpool version 15 (on Solaris 10 U8)? Have a new system coming in shortly and will test myself, but knowing this is a recoverable scenario would help me rest easier as I have an unmirrored slog setup hanging around still. Ray _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
