On Oct 28, 2014 12:31 AM, "Rich Freeman" <ri...@gentoo.org> wrote: > > On Mon, Oct 27, 2014 at 12:52 PM, Pandu Poluan <pa...@poluan.info> wrote: > > > > ZoL (ZFS on Linux) nowadays is implemented using DKMS instead of FUSE, thus > > running in kernelspace, and (relatively) easier to put into an initramfs. > > Sorry about that. I should have known that, but for some reason I got > that memory crossed in my brain... :) > > > vdevs can grow, but they can't (yet) shrink. > > Can you point to any docs on that, including any limitations/etc? The > inability to expand raid-z the way you can do so with mdadm was one of > the big things that has been keeping me away from zfs. I understand > that it isn't so important when you're dealing with large numbers of > disks (backblaze's storage pods come to mind), but when you have only > a few disks being able to manipulate them one at a time is very > useful. Growing is the more likely use case than shrinking. Then > again, at some point if you want to replace smaller drives with larger > ones you might want a way to remove drives from a vdev. >
First, you need to set your pool to "autoexpand=on". Then, one by one, you offline a disk within the vdev and replace it with a larger one. After all disks have been replaced, do a scrub, and ZFS will automagically enlarge the vdev. If you're not using whole disks as ZFS, then s/replace with larger/enlarge the partition/. Rgds, --
