> If first 128M doesn't hit, I highly doubt something more strange happened.
Not sure I follow, do you mean if it doesn't hit then it's likely something else went wrong? > I'm considering something like encryption. > Maybe the disk is already encrypted by hardware? The drives were never encrypted, none of my drives are > Windows is just a black box, I have no idea what a Windows could do to a > disk. > > But it doesn't explain why the 2nd super block can't be located, unless > Windows is wipe more data than the first 128M. I'm thinking Windows may have tried to convert them to Dynamic disk on detecting them and assuming they're empty. > > If the disk is larger than 256G, would you please try to locate the last > possible super at 256G? They're both 6TB drives > > # dd if=/dev/sdb bs=1M of=last_chance.raw count=128 skip=256M > # grep -obUaP "\x5F\x42\x48\x52\x66\x53\x5F\x4D" last_chance.raw dd returns: dd: /dev/sdb: cannot skip: Invalid argument
