On Sun, Mar 13, 2011 at 11:46 PM, Jérôme Poulin <jeromepoulin@xxxxxxxxx> wrote: > As a sidenote USB converters don't have low level access to the disk > so it also makes smartctl and stuff not working at all. That depends on the disk and controller. I had an old USB controller with PATA disk, smartctl was unusable on it. Smartctl was perfectly usable on another one with SATA disk in it. > I was not able to find any USB converter which was working correctly > using ddrescue and a defective disk yet. That would also depend on kernel version. My disk was having some bad sectors, and with an old version of Ubuntu (forgot which one exactly) running e2fsck -c (to check the badblocks) failed because USB resets keep happening and the disk was finally undetected, while on Ubuntu maverick (kernel 2.6.35) the check was completed and badblocks marked correctly. dd_rescue should also work, and you might want to use a bigger value for "-B" so it would be faster. -- Fajar -- 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
