I have a laptop partition (truecrypt) backed up with dd since it's impossible to back it up with anything else but do a raw bit by bit copy like:
dd if=/dev/sda of=imagefile.img
I can of course successfully restore this as well but the restore time is long with the default bs (512).
Would it cause any inconsistency if I would increase the BS size to let's say 1MB? The machine have 8Gb memory, reading 1mb or 10mb or 100mb into memory before writing it out to the disk shouldn't matter but I'm curious what will it do when it reaches the end of the image file and the end of the partition. Wouldn't it try to overwrite data on the next disk area??
Let's say at the last read only 512bytes left in the image, wouldn't it try to write out that 512bytes+the remaining 0.00048828125 Mbyte to the disk?
dd if=imagefile.img of=/dev/sda1 bs=1M