Date: Fri, 25 Jan 2008 23:48:28 -0600 From: Richard Todd <rmtodd@ichotolot.servalan.com> To: freebsd-stable@freebsd.org Subject: Re: "ad0: TIMEOUT - WRITE_DMA" type errors with 7.0-RC1 Message-ID: <x7sl0l3zo3.fsf@ichotolot.servalan.com> In-Reply-To: <servalan.mailinglist.fbsd-stable/479A8A24.5050409@skyrush.com> (Joe Peterson's message of "Fri, 25 Jan 2008 18:17:24 -0700") References: <479A0731.6020405@skyrush.com> <20080125162940.GA38494@eos.sc1.parodius.com> <479A3764.6050800@skyrush.com> <3803988D-8D18-4E89-92EA-19BF62FD2395@mac.com> <479A4CB0.5080206@skyrush.com> <20080126003845.GA52183@eos.sc1.parodius.com> <20080126010054.GA52891@eos.sc1.parodius.com> <20080126010653.GA53255@eos.sc1.parodius.com> <479A8A24.5050409@skyrush.com>
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Joe Peterson <joe@skyrush.com> writes: > Glad you got it back! Yes, when I was first playing with ZFS, I noticed > that booting between single and multi user mode could make the pools > "invisible". Import seemed to bring them back... Yeah. ZFS pools record the hostid of the system that accessed them last. When you boot in single-user mode, /etc/rc.d/hostid doesn't get run, so the hostid is zero, which doesn't match the hostid in the pool, so the pool doesn't show up without an import. Workaround: always make sure you run /etc/rc.d/hostid start in single-user before doing any ZFS tinkering.
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