On Wednesday 08 Feb 2012 11:33:42 Hinnerk van Bruinehsen wrote: > On 08.02.2012 12:02, Michael Mol wrote: > > On Tue, Feb 7, 2012 at 6:28 PM, Christopher Kurtis Koeber > > > > <ckoe...@gmail.com> wrote: > >> Hello, > >> > >> I am trying to recover MySQL databases (which were properly shut > >> down) from an EXT4 formatted hard disk. > > > > What happened to require the recovery? Which parts of the database > > server shut down properly, and which didn't? > > > >> I loaded the SystemRescueCD distro that you can get online and > >> when running TestDisk I can see the partitions but I cannot > >> recover said partitions because it tells me the structure is bad > >> (any options here, by the way?)
> You could try Autopsy & sleuthkit[1]. > Before you do anything to the drive it would be wise to copy it via dd > so that no accidental write makes anythoing worse... > > > > [1] http://www.sleuthkit.org/autopsy/desc.php Definitely create an image of the partition first, rather than keep accessing the real thing. At this moment you don't know what caused the corruption - it could well be a warning of worse things to come as far as this drive is concerned ... ;-) It is much better if you create the image with dd-rescue/ddrescue (can't recall which of the two packages is claimed to be better). You may also want to make a backup copy of the image in case you embark on any destructive operations on it. Multiple passes with ddrescue may recover more bits/bytes so hopefully you'll have a more complete set of data to work with. > >> With PhotoRec, I can recover parts of the MySQL Database but I > >> cannot get the important *.MYD files because I guess PhotoRec > >> doesn't have the signatures for that type of file. > >> > >> So, any options I have at this point? You can use dd or hexdump to pick up some blocks at the start of a known good *.MYD file, create a signature for PhotoRec and add it on the list of files to check for. See the instruction of how to go about this here: http://www.cgsecurity.org/wiki/Add_your_own_extension_to_PhotoRec -- Regards, Mick
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