On 5/13/13 7:24 AM, Benedikt Schmidt wrote: > Hi, currently I'm looking for the correct usage of the force_geometry > option of xfs_repair. I wasn't able to find more documentation on > this option beside that it exists. Could please somebody explain it > to me? > > For a more detailed description of my problem: I've got here a hard > disk which is dying at the moment, so I copied all the content with > dd_rescue to a new and bigger one. To use xfs_copy wasn't possible as > the filesystem was already corrupted. So now I've got nearly > everything on the second hard disk (dd_rescue could'nt copy something > around 6 or 7 MB), but I can not mount the filesystem or even run > xfs_repair on it, as it fails to find a superblock. I think the > problem lies in the fact that the new disk has a different geometry > than the previous one. the geometry in "force_geometry" refers to the filesystem geometry, not the CHS geometry of your disk. It's only needed if the fs has only 2 allocation groups and they don't match, or if the fs has only a single allocation group (and therefore has nothing to test against). So I don't think that's the option you need. I don't know what you copied the fs to, but perhaps you copied the entire disk, not the partition. How did you invoke dd_rescue? If you dd_rescued to a file, what does: # file <file you dd'd to> say? Or, if you dd_rescued to a device, what does # file -s <dev you dd'd to> say? -Eric _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
