Date: Tue, 13 Sep 2011 16:59:38 +0300 From: Andriy Gapon <avg@FreeBSD.org> To: freebsd-current@FreeBSD.org, freebsd-fs@FreeBSD.org, Pawel Jakub Dawidek <pjd@FreeBSD.org> Subject: Re: ZFS: i/o error - all block copies unavailable after upgrading to r225312 Message-ID: <4E6F61CA.6020003@FreeBSD.org> In-Reply-To: <4E679D3D.1000007@FreeBSD.org> References: <20110901223646.14b8aae8@o2.pl> <4E60DBBD.1040703@FreeBSD.org> <4E679D3D.1000007@FreeBSD.org>
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on 07/09/2011 19:35 Andriy Gapon said the following: > on 02/09/2011 16:35 Andriy Gapon said the following: >> Then: >> - obtain this patch http://people.freebsd.org/~avg/zfstest.head.diff >> - cd sys/boot/zfs >> - apply the patch to zfstest.c >> - cc -I. -I../../cddl/boot/zfs zfstest.c -o zfstest >> - run the resulting binary as root and provide your pool device(s) as >> parameter(s); e.g.: >> ./zfstest /dev/ada0p4 > > Thanks to a lot of excellent testing, debugging and analysis from Sebastian (which > went behind the scenes) we now have this patch: > http://people.freebsd.org/~avg/zfs-boot-gang.diff I've updated the patch place. The essence of the changes is the same, just done in a slightly different fashion. That should minimize the scope of the diff. One extra change is that now the checksum is also verified for uberblock. Pawel, can you please review it? > The patch introduces the following changes: > - checksum is now verified for gang header blocks > - checksum is now verified for reconstituted data of whole gang blocks > (previously it is verified only for individual gang member leaf blocks) > - reconstituted data of a whole gang block is now decompressed if the gang block > is compressed > > The last change is _the_ change. > > If you use compression for a filesystem where your kernel resides and you get a > problem with booting, then please test this patch and report back. > > Many thanks to Sebastian! > Additional heap of thanks to Doug Rabson who came up with the idea and > implementation of zfstest.c! This tool is of the immense help when debugging an > issue like this one. > -- Andriy Gapon
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