> How do you combine dd with gzip?

# dd < /dev/ada0 bs=8m | gzip -c -9 > /mnt/file.raw.gz

> How do you use pv if the source is raw device?

# dd < /dev/ada0 bs=8m | pv | dd > /dev/ada1 bs=8m

> How do you dd over ssh?

# dd < /dev/ada0 bs=8m | gzip -9 | pv | ssh user@host 'dd > /dev/da1 bs=8m'

> This belief can make simple tasks complicated.

As master Dennis Ritchie once said - "UNIX is very simple, it just needs a genius to understand its simplicity."