Always remember the block size option on dd
I am currently having to copy one 50GB partition over another 50GB partition. dd
is great for this
but the first time I did this I forgot to set the block size so dd
defaulted to 512 bytes. An hour
and 10 minutes later dd
finished. The second time I remembered to set it to 20MB (just add bs=20M
as one of the parameters for dd
) and it took just under 9 minutes. Just to see what difference it
makes I ran it a third time with a block size of 40MB and it took just over 7 minutes.
In the future I really should try harder to remember to set the block size when using dd
.
Jason
— 2010-07-27