On Wednesday 24 February 2010, planetf1 wrote: > Hi, Hi > Let me know if this is the wrong place to ask... > > I'm using Fedora 12 x86_64, mostly with the newer 21.6.32 kernel, and > have a single btrfs filesystem within a 120Gb partition. > > I'd like to extend the space btrfs can use. One option is presumably > add a new device to btrfs, but I was hoping to simple resize the > existing partition to say 160Gb. > > With ext4 I might do this with gparted , although mostly I'd use LVM, > with seperate LVs for /opt /home / etc and that's been the way I've done > it for many years. > > With btrfs I'm unsure as to the safe steps and decided to skip on use > of LVM giving the enhanced capabilities of btrfs itself. > > Is it ok to resize the partition with gparted? IIRC gparted want to resize both partition and filesystem. So if gparted doesn't support btrfs, it will not be usable > How do I make btrfs use the new partition size? I am never tried, but it should be sufficient to a) resize the underling partition (with fdisk) b) resize the filesystem (with btrfsctl -r <size> <path-to-filesystem>).
If you want to grow the filesystem, the step are a) then b). Otherwise if you want to shrink the filesystem the step are b) then a) Pay attention to: - btrfs support online filesystem - if you resize a partition it may be required to reboot the system, otherwise the kernel may not be able to read the new size of the partition - if you pass 'max' as size of the btrfsctl utility, the filesystem grows up to fill all available space. I suggest you to test the resizing on a loop device before tring a real filesystem. > Or are there other btrfs specific tools that can manage partitions Not in my knowledge > Would I be better off still using lvm in conjunction with btrfs? In theory btrfs has the capability to add/remove device and resize a filesystem. But it is a young filesystem, so the results may be not the one expected. > Are there good pointers to useful user material on btrfs on these issues? http://btrfs.wiki.kernel.org/index.php http://btrfs.wiki.kernel.org/index.php/Using_Btrfs_with_Multiple_Devices > Is creating new subvolumes to manage /home (say I want to limit that > space, and create snapshots independently) appropriate, and if so what's > the easiest way to do that -- I had trouble with getting the subvolume > ops to work If you don't use snapshot creating a subvolume is not useful. If you had problem, post the command which you had used. > Mostly rather than NEED btrfs per se, I'm using a clean laptop > environment as a way to experiment with the new filesystem & understand > how to manage it. > > Thanks > Nigel. > b...@cherrybyte.me.uk > BR Goffredo > > -- > 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 > -- gpg key@ keyserver.linux.it: Goffredo Baroncelli (ghigo) <kreijackATinwind.it> Key fingerprint = 4769 7E51 5293 D36C 814E C054 BF04 F161 3DC5 0512 -- 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
