Date: Mon, 1 Jul 2013 21:08:12 +0200 From: Rainer Duffner <rainer@ultra-secure.de> To: freebsd-stable List <freebsd-stable@freebsd.org> Subject: Re: ZFS Panic after freebsd-update Message-ID: <E9EB59AD-D737-438D-830D-3124952F3785@ultra-secure.de> In-Reply-To: <C21331A74BF7486382EC2D0B129665DB@multiplay.co.uk> References: <CA%2B30O_P7=3FanLaxjHQ71grqWLfTxNJXb6kP5-eWYWEYZFoVtw@mail.gmail.com> <20130701154925.GA64899@icarus.home.lan> <C13462A8-88DC-4EEF-9356-CF655B8EA8E8@vt.edu> <20130701170422.GA65858@icarus.home.lan> <CA%2B30O_PYPAWFwYoQo7AOC3Y5dGcPzYk65qrXxgZ4nJfH6i4Kvw@mail.gmail.com> <C21331A74BF7486382EC2D0B129665DB@multiplay.co.uk>
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Am 01.07.2013 um 20:56 schrieb "Steven Hartland" = <killing@multiplay.co.uk>: > ----- Original Message ----- From: "Scott Sipe" <cscotts@gmail.com> >> So I realize that neither 8.2-RELEASE or 8.4-RELEASE are stable, but = I >> ultimately wasn't sure where the right place to go for discuss 8.4 = is? >> Beyond the FS mailing list, was there a better place for my question? = I'll >> provide the other requested information (zfs outputs, etc) to = wherever >> would be best. >> This is a production machine (has been since late 2010) and after = tweaking >> some ZFS settings initially has been totally stable. I wasn't = incredibly >> closely involved in the initial configuration, but I've done at least = one >> binary freebsd-update previously. >> Before this computer I had always done source upgrades. ZFS (and the >> thought of a panic like the one I saw this weekend!) made me leery of = doing >> that. We're a small business--we have this server, an offsite backup >> server, and a firewall box. I understand that issues like this are = are >> going to happen when I don't have a dedicated testing box, I just = like to >> try to minimize them and keep them to weekends! >> It sounds like my best bet might be to add a new UFS disk, do a clean >> install of 9.1 onto that disk, and then import my existing ZFS pool? >=20 > There should be no reason why 8.4-RELEASE shouldn't work fine. >=20 > Yes ZFS is continuously improving and these fixes / enhancements first = hit > head / current and are then MFC'ed back to stable/9 & stable/8, but = that > doesn't mean the release branches should be avoided. >=20 > If you can I would try booting from a 8.4-RELEASE cdrom / iso to see > if it can successfully read the pool as this could eliminate out of = sync > kernel / world issues. Personally, I find mfsbsd much more practical for booting up a = "rescue-environment". Also, if 8.4 does not work for some reason - maybe try 8.3? I have quite a lot of systems running 8.3 (and even more with 9.1) but = none of them do zfsroot and none of them stresses ZFS very much. I've so far resisted the urge to update to 8.4. The reason why I would be interested to run zfs-root is that sometimes, = you only have two hard drives and still want to do ZFS on it. Ideally, though, FreeBSD would be able to do something like SmartOS (one = of the few features I kind of like about it=85), where you boot from an = USB-image (or ideally, via (i)PXE) but use all the available space for = data and (3rd-party) software. That way, you always have something to = boot from, but can maximize the usage of spindles and space. A basic FreeBSD install is, I think, less than 0.5G these days - I = really hate wasting two 300 (or even 600) GB SAS hard disks just for = that.
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