Date: Thu, 4 Jul 2013 14:02:59 +0300 From: Kimmo Paasiala <kpaasial@gmail.com> To: Dmitry Morozovsky <marck@rinet.ru> Cc: freebsd-fs@freebsd.org Subject: Re: boot from ZFS: which pool types use? Message-ID: <CA%2B7WWSc0-8R5Q03nG9wkaULO-kcJ%2BK8yZixzXd5L7_fAR6GO4A@mail.gmail.com> In-Reply-To: <alpine.BSF.2.00.1307041424030.2446@woozle.rinet.ru> References: <alpine.BSF.2.00.1307041424030.2446@woozle.rinet.ru>
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On Thu, Jul 4, 2013 at 1:42 PM, Dmitry Morozovsky <marck@rinet.ru> wrote: > Dear colleagues, > > I'm a bit stuck and possibly my google-fu sleeps somewhere, but I have > inconsistent cases on what pool types can one use to boot contemporary > (read: stable/9) FreeBSD from. > > For example, I have many older servers with UFS /bootdisk and ZFS-on-root. > While this is useable, it does not seem to be very consistent. > > On the other hand, I have a couple of servers with ZFS-only config which uses > complex raid10-like config on gpart disks, and they boot flawlessly, at lest > till now. > > Lastly, I'm now in process of setting up new server, and trying to do the same, > configuring ZFS with 4 pairs of SAS, now have > > Can't find /boot/zfsloader > > I suppose from line 619 from sys/boot/i386/zfsboot/zfsboot.c > > Configs are essentially the same, I double-check gpart bootcode and zpool.cache > (while I still did not found the guide how to interprete its content; at least > one of my ZFS servers successfully runs without it) > > Any hints? Are stripe-mirror configuration available for booting from (yes, I > do remember that all, or at last enough for degraded use, disks should be > exposed to BIOS by controller firmware, and it is usually constrained to 6 or 8 > disk devices) > > Thanks! > > > -- > Sincerely, > D.Marck [DM5020, MCK-RIPE, DM3-RIPN] > [ FreeBSD committer: marck@FreeBSD.org ] > ------------------------------------------------------------------------ > *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru *** > ------------------------------------------------------------------------ > _______________________________________________ I no longer have my FreeBSD 9-STABLE fileserver but I was booting succesfully from a four disk striped mirror ZFS pool (two 2-disk mirror vdevs in other words) that was pure ZFS, no UFS /boot involved. It always worked like a charm. -Kimmo
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