On Wednesday 08 of December 2010 22:53:25 William Sheffler wrote: > Hello btrfs community. > > First off, thanks for all your hard work... I have been following > btrfs with interest for several years now and very much look forward > to the day it replaces ext4. The real killer feature (of btrfs > specifically) for me is the ability to add *and remove* devices from a > filesystem, as this allows rolling upgrades of my server's disks. I > have a 16 port 3ware 1650SE on which I have a number of small raid > units and it will be fantastic to be able to remove the oldest, > upgrade, and add the new storage back. I had previously been using > ZFS, but since ZFS doesn't allow removal of devices, this rolling > upgrade strategy doesn't work. > > My question is this: can btrfs handle striping (raid 0) across > heterogeneous devices? I seem to be losing any capacity on the larger > disk beyond what is available on the smaller disk. I really hope there > is some simple fix!
Yes, it can handle stripping over devices of different size, unfortunately you're still limited to <size of smallest device>*<number of devices> if you want to use all the available space use "-d single" when creating volume for details, read the recent thread "800GB free, but no space left" -- Hubert Kario QBS - Quality Business Software 02-656 Warszawa, ul. Ksawerów 30/85 tel. +48 (22) 646-61-51, 646-74-24 www.qbs.com.pl -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
