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Copy a file using dd and watch its progress

Terminal - Copy a file using dd and watch its progress
dd if=fromfile of=tofile & DDPID=$! ; sleep 1 ; while kill -USR1 $DDPID ; do sleep 5; done
2010-01-12 15:01:44
User: deltaray
Functions: dd kill sleep
4
Copy a file using dd and watch its progress

This is a more accurate way to watch the progress of a dd process. The $DDPID=$! is needed so that you don't get the PID of the sleep. The sleep 1 is needed because in my testing at least, if you run kill -USR1 against dd too quickly, it will kill it off instead of display the status. So you need to wait a second, probably so that it can configure itself to trap the USR1 signal.

Alternatives

There are 4 alternatives - vote for the best!

Terminal - Alternatives
pv sourcefile > destfile
2010-03-20 20:55:18
User: edo
Tags: pv
50

pv allows a user to see the progress of data through a pipeline, by giving information such as time elapsed, percentage completed (with progress bar), current throughput rate, total data transferred, and ETA. (man pv)

dd if=/dev/sdc of=/dev/sdd conv=notrunc & while killall -USR1 dd; do sleep 5; done
2010-01-12 14:09:40
User: bw
Functions: dd killall sleep
3

The following command will clone usb stick inside /dev/sdc to /dev/sdd

Double check you got the correct usb sticks (origional-clone)with fdisk -l.

dc3dd progress=on bs=512 count=2048 if=/dev/zero of=/dev/null
watch ls -lh /path/to/folder
2014-03-27 10:51:36
User: vonElfensenf
Functions: ls watch
Tags: pv
0

forgot to use a pv or rsync and want to know how much has been copied.

Know a better way?

If you can do better, submit your command here.

What others think

dd if=fromfile | pv | dd of=tofile

It's possible you must install PV...

http://www.ivarch.com/programs/pv.shtml

Comment by richard 289 weeks and 2 days ago

Your point of view

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