On Thu, Jan 05, 2012 at 08:11:31PM -0500, Cory Coager wrote: > On 01/05/2012 03:11 AM, Arno Wagner wrote: > > Well, that is not a LUKS header, that looks like an EFI MBR > > or bootsector. There is no trace of the LUKS header. > > > > Either something is writing this to your disk > > or, if this is an USB disk, the USB-to-SATA controller in > > the disk may be doing this in violation of the spec, probably > > in a misguided atempt to make this thing usable under Windows. > > > > Is this really /dev/sdb1 and not /dev/sdb and is the partition > > still there? > > > > As to your data, unless you have a LUKS header backup, it is > > very likely gone. > > > > Here is something you can try: Zero the first GB or so of > > the drive, sync, reboot and see whether anything is on it. > > Then do the same, but unplug the drive while the computer > > is on and hotplug it after booting. And finaly do the same > > and unplug and replug the drive without booting the computer. > > That could give indication of whether the drive is doing > > something by itself or whether the PC is writing something. > > > > Arno > OK, I have a good deal of information of what the problem is. The issue > seems to happen on two specific computers but not a third. They aren't > recognizing the entire hard drive size. fdisk is showing 3tb for > /dev/sdb but if I run fdisk on /dev/sdb1 it only shows 2199 GB for size. > > Now, when I connected this drive to the third machine, it works > perfectly. My data is still intact, I can see the LUKS header and I can > mount the file system. Aha, so this is some broken mapping for large drives. Then the EFI header could be something left over that does not matter at all. > Now that I've narrowed down the issue, how can I resolve it? Why can't > these two computers see the entire drive size? > > Both are custom builds, the drive was connected directly via SATA > > Computer #1 > Abit KN8 Motherboard > BIOS version 6.00 PG > AMD Athlon(tm) 64 Processor 3200+ > > Computer #2 > Asus A8N32-SLI-Deluxe Motherboard > BIOS version 1303 > AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ > > > Do you think I need a BIOS update or am I missing something in the OS? I suspect that a BIOS update is necessary. For older boards that coul be problematic. There may also be a hardware limitation in there somewhere, I am not sure. It may be a good idea to use the drives only via USB on the older computers. However, not a cryptsetup problem, so let us take this off the list. Arno -- Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno@xxxxxxxxxxx GnuPG: ID: 1E25338F FP: 0C30 5782 9D93 F785 E79C 0296 797F 6B50 1E25 338F ---- One of the painful things about our time is that those who feel certainty are stupid, and those with any imagination and understanding are filled with doubt and indecision. -- Bertrand Russell _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
