On Sun, Mar 13, 2011 at 9:39 AM, Jérôme Poulin <jeromepou...@gmail.com> wrote: > Re-send as non-HTML > On Sun, Mar 13, 2011 at 7:46 AM, Peter Stuge <pe...@stuge.se> wrote: >> >> Pau Iranzo wrote: >> > I installed Ubuntu on my girlfriend's laptop using btrfs as a >> > filesystem. But a few weeks ago something happened: the system >> > wouldn't boot and always show these messages: >> > http://dl.dropbox.com/u/120126/btrfs/IMG_20110313_122119.jpg >> > http://dl.dropbox.com/u/120126/btrfs/IMG_20110313_122125.jpg >> > http://dl.dropbox.com/u/120126/btrfs/IMG_20110313_122143.jpg >> >> The hard drive is broken. >> >> This would have happened at the same point in time regardless of >> btrfs or not, and regardless of Linux or not. >> > > Just to confirm, the hard disk is broken, I guess you installed Ubuntu > first because Windows was getting slow, it probably was the hard disk > at this time. > >> >> > The problem is that there is now way to mount that partition and all >> > the analysis tools don't give any information. I know there is no fsck >> > for btrfs, so it is just a shame for me, because my girlfriend is >> > really angry at me for this. >> > >> > Foremost is not able to recover files neither. >> > >> > Could anyone help me on this? I don't mind if the system does not >> > start, but I need to recover some files (pictures basically). >> >> Take out the disk from the machine. Get a USB-adapter. Prepare for >> running dd_rescue on another Linux system. Hook up broken drive. Run >> dd_rescue to make a copy of the disk that you can work on. Disconnect >> broken drive. Every second it is powered the chance to recover data >> decreases. Only power it up when you must, and when you are well >> prepared to extract complete contents from the disk. Try to analyze >> how the btrfs is broken. Try to fix it. Mount and recover data. >> >> Meanwhile buy new hard drive and reinstall a system so your friend >> has a working computer. >> > > Never plug a defective drive on USB if it is the source, only the > destination can be plugged USB, else defective sectors get transferred > as good filled with random stuff and it only makes data recovery > worst, also, there is ddrescue and dd_rescue, you try both, just make > sure you save a logfile, I don't remember if dd_rescue has one.
I would highly recommend using GNU ddrescue over dd_rescue. The reason are that 1: I have had great success with GNU ddrescue 2: It appears from the description of dd_rescue : http://www.garloff.de/kurt/linux/ddrescue/ that it attempts smaller block sizes on the *first* pass, which could further decrease the lifespan of the drive before getting all of the blocks which can be read with a larger block size. For information about GNU ddrescue's algorithm for getting as much data as possible from a failing drive see "info ddrescue". -- Jordan Uggla (Jordan_U on irc.freenode.net) -- 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
