> On 20 Mar 2018, at 09:50, Markus Wild <fbsd-li...@dudes.ch> wrote: > > Hi there, > >> I've been encountered suddenly death in ZFS full volume >> machine(r330434) about 10 days after installation[1]: >> >> ZFS: i/o error - all block copies unavailable >> ZFS: can't read MOS of pool zroot >> gptzfsboot: failed to mount default pool zroot >> > >> 268847104 30978715648 4 freebsd-zfs (14T) > > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > > I had faced the exact same issue on a HP Microserver G8 with 8TB disks and a > 16TB zpool on FreeBSD 11 about a year ago. > My conclusion was, that over time (and updating the kernel), the blocks for > that kernel file were reallocated to a > later spot on the disks, and that however the loader fetches those blocks, it > now failed doing so (perhaps a 2/4TB > limit/bug with the BIOS of that server? Unfortunately, there was no UEFI > support for it, don't know whether that > changed in the meantime). The pool was always importable fine with the USB > stick, the problem was only with the boot > loader. I worked around the problem stealing space from the swap partitions > on two disks to build a "zboot" pool, just > containing the /boot directory, having the boot loader load the kernel from > there, and then still mount the real root > pool to run the system off using loader-variables in loader.conf of the boot > pool. It's a hack, but it's working > fine since (the server is being used as a backup repository). This is what I > have in the "zboot" boot/loader.conf: > > # zfs boot kludge due to buggy bios > vfs.root.mountfrom="zfs:zroot/ROOT/fbsd11" > > > If you're facing the same problem, you might give this a shot? You seem to > have plenty of swap to canibalize as well;) >
please check with lsdev -v from loader OK prompt - do the reported disk/partition sizes make sense. Another thing is, even if you do update the current build, you want to make sure your installed boot blocks are updated as well - otherwise you will have new binary in the /boot directory, but it is not installed on boot block area… rgds, toomas _______________________________________________ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
