2009/2/8 Anupam Garg <garga@xxxxxxxxxxxx>: > Hi, > I am using btrfsctl to snapshot, however it does not seem to be working. > I am doing: > > > + umount /btrfs > + mkfs.btrfs /dev/sdb1 > > WARNING! - Btrfs v0.18-12-ge3b0f66 IS EXPERIMENTAL > WARNING! - see http://btrfs.wiki.kernel.org before using > > fs created label (null) on /dev/sdb1 > nodesize 4096 leafsize 4096 sectorsize 4096 size 19.99GB > Btrfs v0.18-12-ge3b0f66 > + btrfsctl -A /dev/sdb1 > operation complete > Btrfs v0.18-12-ge3b0f66 > + mount -t btrfs /dev/sdb1 /btrfs > + cd /btrfs > + btrfsctl -S base . > operation complete > Btrfs v0.18-12-ge3b0f66 > + dd if=/dev/urandom of=/btrfs/base/data bs=1M count=20 > 20+0 records in > 20+0 records out > 20971520 bytes (21 MB) copied, 3.82335 s, 5.5 MB/s > + ls -l /btrfs/base/data > -rw-r--r-- 1 root root 20971520 2009-02-07 19:59 /btrfs/base/data > + btrfsctl -s rev1 /btrfs/base > operation complete > Btrfs v0.18-12-ge3b0f66 > + ls -l /btrfs/base/data > -rw-r--r-- 1 root root 20971520 2009-02-07 19:59 /btrfs/base/data > + ls -l /btrfs/rev1/data > -rw-r--r-- 1 root root 0 2009-02-07 19:59 /btrfs/rev1/data > > At the end, I expect the sizes of /btrfs/base/data & /btrfs/rev1/data to be > the same. > Is that expectation correct? > > I'm sure I'm missing something fundamental here. I'm at the latest progs and > kernel according to git. > I've read the wiki, but can't figure out what I'm missing. > > Please run sync(1) before creating the snapshot -- 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
