Date: Fri, 14 May 2010 14:20:02 GMT From: Volodymyr Kostyrko <c.kworr@gmail.com> To: freebsd-fs@FreeBSD.org Subject: Re: bin/144214: zfsboot fails on gang block after upgrade to zfs v14 Message-ID: <201005141420.o4EEK27s055129@freefall.freebsd.org>
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The following reply was made to PR bin/144214; it has been noted by GNATS. From: Volodymyr Kostyrko <c.kworr@gmail.com> To: Andriy Gapon <avg@icyb.net.ua> Cc: bug-followup <bug-followup@freebsd.org>, Robert Noland <rnoland@freebsd.org> Subject: Re: bin/144214: zfsboot fails on gang block after upgrade to zfs v14 Date: Fri, 14 May 2010 17:12:23 +0300 2010/5/13 Andriy Gapon <avg@icyb.net.ua>: > > It seems that I have been misunderstanding the problem. > "ZFS: gang block detected" won't even appear if boot code is too old. > > Having briefly glanced over the code and comparing it to the code in osol and in > zio_gang_tree_issue(), I think the following change is needed. > But I am not sure if it is a real fix for the issue at hand. > > If anyone can reproduce the problem, could you please test this change? > Thanks! Tested it. Same problem. 1. Rebuild and reinstall on i386. Filling disk up (600M free of 120G, 0.5%). 2. Immediately after starting boot screen bursts into psychic colors. Computer reboots. 3. Booted from ftp://ftp.freebsd.org/pub/FreeBSD/snapshots/201004/FreeBSD-8.0-STABLE-201004-i386-livefs.iso in VirtualBox i386. Boot code updated with dd. 4. Same as p2. in vBox i386 takes looong time to rotate dash then spits "ZFS: gang block detected" and hangs. 5. Booted from amd64 install, updated boot code with dd. 6. Booted on amd64. Immediately after starting boot spits out "ZFS: gang block detected" and hangs. 7. Booted from amd64 install. /boot transferred transferred to/from other disk. 8. Booted on amd64. Immediately after starting boot spits out "ZFS: gang block detected" and hangs. 9. Booted from amd64 install. Some files deleted (800M free, files were written contiguously). /boot transferred transferred to/from other disk. 10. Booted on amd64. Results: 1. Patch changes something. However zfsloader(?) still can't be read completely. 2. Bug can happen on amd64. More extreme conditions needed(?). 3. I'll post a follow-up on successfully booting on original i386 hardware. -- Sphinx of black quartz judge my vow.
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