Labels:book | bulletin board | reckoner | sky | tree OCR: block differs from the previ iously-stored checksum then CopyThru knows that the block has changed and writes the block to the destination volume otherwise, the block is not written If you use CopyThru to do periodic backups of a volume the volume doesn't drastically change 5% of the blocks are changed with each backup) and ma disk insertions are typi ically needed, then you can avoid many insertions by using this option Unfortunately, unless your destination device is very slow, you will probably not save much time Neverthel less, it is nice not to have to keep jumping up and down to insert disks while you are trying to watch TV Note: If you have defragged the source disk since the last badkup, remember to turn this option OFF Amount of free memory to use Amount of free disk to use If the ...
