Date: Thu, 15 Mar 2012 15:30:09 +0200 From: George Mamalakis <mamalos@eng.auth.gr> To: =?UTF-8?B?VHJvbmQgRW5kcmVzdMO4bA==?= <Trond.Endrestol@fagskolen.gjovik.no> Cc: stable@freebsd.org Subject: Re: grow zpool on a mirror setup Message-ID: <4F61EEE1.1030909@eng.auth.gr> In-Reply-To: <alpine.BSF.2.00.1203151338450.67839@mail.fig.ol.no> References: <4F61D9F0.6000005@eng.auth.gr> <alpine.BSF.2.00.1203151338450.67839@mail.fig.ol.no>
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Trond, thank you for your reply. Now to my questions: On 03/15/12 14:45, Trond Endrestøl wrote: > On Thu, 15 Mar 2012 14:00+0200, George Mamalakis wrote: > >> "I am experimenting with one installation of FreeBSD-9-STABLE/amd64 on a >> VirtualBox that is using gptzfsboot on a raid-1 (mirrored) zfs pool. My >> problem is that I need to grow the filesystem size of zfs partitions. I >> followed this guide >> <http://support.freenas.org/ticket/342>(http://support.freenas.org/ticket/342), >> which is for FreeNAS, and encountered a few problems. >> >> # gpart show >> => 34 40959933 ada0 GPT (19G) >> 34 128 1 freebsd-boot (64k) >> 162 35651584 2 freebsd-zfs (17G) >> 35651746 5308221 3 freebsd-swap (2.5G) >> >> => 34 40959933 ada1 GPT (19G) >> 34 128 1 freebsd-boot (64k) >> 162 35651584 2 freebsd-zfs (17G) >> 35651746 5308221 3 freebsd-swap (2.5G) > There's one mistake I'd point out. Your ZFS partitions are followed by > your swap partitions. It would be a lot easier if the ZFS partitions > were the last one on each drive. Why is this a mistake? Shouldn't ZFS grow up to the size of its underlying partition, regardless of its position? Is this restriction documented somewhere? > Since your are using VirtualBox, I would simply create a new pair of > virtual drives with the desired sizes and attach these to your VM. > Next, create new boot, swap, and ZFS partitions, in this particular > order, on the new drives. Create a ZFS pool using the new ZFS > partitions on the new drives, and transfer the old system from the old > drives to the new drives, using a recursive snapshot and the zfs > send/receive commands. Remember to set the bootfs property on the > newly created ZFS pool prior to reboot. > I understand that there are quite a few alternatives on how I could migrate my system to one with larger disks, but I hoped that the method that was supposed to work with zpool and gpart, would have worked indeed (It was the simple, and required less space than the one that you propose). Thanks again for your answer! -- George Mamalakis IT and Security Officer Electrical and Computer Engineer (Aristotle Un. of Thessaloniki), MSc (Imperial College of London) Department of Electrical and Computer Engineering Faculty of Engineering Aristotle University of Thessaloniki phone number : +30 (2310) 994379
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