You would need to apply this patch to your kernel: http://www.mail-archive.com/linux-btrfs@xxxxxxxxxxxxxxx/msg09096.html Is there any chance this patch gets in linux-next ? I use this feature all the time and it never broke on me. On Tue, Dec 20, 2011 at 10:07 AM, Dave <dave@xxxxxxxxxxxxxxxx> wrote: > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > So I've got a daily snapshot of my /home subvolume. Due to a fat finger, I've > damaged a rather large file so I'd like to pull if from one of these snapshot > backups. I don't want to simply copy the file since it's many gigs and cp > - --reflink=always doesn't work (produces the error Invalid cross-device link). > Is there a way to recover that file and benefit from COW? > - -- > - -=[dave]=- > > Entropy isn't what it used to be. > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.11 (GNU/Linux) > > iF4EAREIAAYFAk7wpKUACgkQXM0u5ajNnCgMUQD/Uf0/HygZ9D8StT9Oc6E3+wM/ > MBokh6h1iPN2OslJTxgA/RUzFMM2n0+3ORHwvOraJMBJl1P4JfabT31iuemn/BL2 > =2cds > -----END PGP SIGNATURE----- > -- > 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 -- 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
