2009/6/15 Ravi Pinjala <ravi@xxxxxxxxxxxx>: > I'm trying to create a multi-device filesystem on top of regular files > (not actual disks), and mount that to a loopback device. For a > filesystem created on a single file, it works fine, but for a filesystem > across multiple files, it doesn't. > > > > dd if=/dev/zero of=img1 bs=4096 count=65536 > dd if=/dev/zero of=img2 bs=4096 count=65536 > dd if=/dev/zero of=img3 bs=4096 count=65536 > dd if=/dev/zero of=img4 bs=4096 count=65536 > > mkfs.btrfs img1 > mount -o loop -t btrfs img1 /mnt/test # works > > mkfs.btrfs img1 img2 img3 img4 > mount -o loop -t btrfs img1 /mnt/test # fails > > Please setup loop devices for the image files manually. In this case, 'mount -o loop' can't do it for you. For example: mkfs.btrfs img1 img2 img3 img4 for i in `seq 1 4`; do losetup /dev/loop$ img$i; done btrfsctl -a mount -t btrfs /dev/loop1 /mnt/test See below for more information: http://btrfs.wiki.kernel.org/index.php/Using_Btrfs_with_Multiple_Devices Yan, Zheng -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
