Date: Mon, 17 May 2010 10:05:37 -0700 From: James Armstrong <jamescarmstrong@gmail.com> To: freebsd-fs@freebsd.org Subject: Re: Root mount from ZFS takes forever...literally. Message-ID: <AANLkTimULeDLYpRIXCOulKUeo4GsFU_tkcFTbXhUDXl5@mail.gmail.com> In-Reply-To: <20100517165352.GA12092@icarus.home.lan> References: <598841171.20100515193024@nitronet.pl> <4BF164DD.4060502@icyb.net.ua> <1554873904.20100517184702@nitronet.pl> <20100517165352.GA12092@icarus.home.lan>
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On Mon, May 17, 2010 at 09:53, Jeremy Chadwick <freebsd@jdc.parodius.com>wrote: > On Mon, May 17, 2010 at 06:47:02PM +0200, Pawel Tyll wrote: > > >> Boot process "hangs" on Trying to mount root from zfs:tank/root - I > > >> can import the pool from alternate boot source (PXE), and access files > > >> fine, but I can't finish booting the system from ZFS. > > > What messages do you have on screen when this happens? > > > Can you upload a screenshot somewhere and post a link? > > Just mounting root, and nothing happens. System is responsive, > > attaching/detaching USB keyboard generates messages, and hitting > > alt+ctrl+del correctly reboots the system. > > > > After messing around with fstab (added / entry, bit redundant with > > loader.conf vfs.root.mountfrom entry) it started to working again, but > > I can't repeat it now by removing this. Too bad I didn't take a > > snapshot before fixing :( > > > > Strange. :) > > Are you *absolutely sure* the problem has to do with ZFS? I see you > mention PXE booting...... > > This sounds much like an environment where serial console is set up > incorrectly; kernel messages will be seen up to the final "Mounting > root..." message, but everything past that goes to VGA console (or > serial console, depends on the configuration mishap). > > We've seen a similar issue, Ctrl-T shows a zfs process running, and there is a lot of activity on some of the disks in our zfs array. James
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