Ralph Shumaker wrote:
Barry Gershenfeld wrote:
I have copied smaller drives using dd and writing the results to an
interim file. I also did it in pieces, since dd is silent during the
process and I wanted to track its progress. Because dd lets you copy
a selected section, this works, and also the following trick:
I seem to remember many moons ago Carl presenting a way to get dd to
give updates as it worked. I've long forgotten the details and I may
even be wrong on who it was that posted it. Carl?
You can send a signal to dd so that it will report its progress. From
the man page:
Sending a USR1 signal to a running ‘dd’ process makes it print I/O
statistics to standard error and then resume copying.
$ dd if=/dev/zero of=/dev/null& pid=$!
$ kill -USR1 $pid; sleep 1; kill $pid
18335302+0 records in 18335302+0 records out 9387674624 bytes
(9.4 GB) copied, 34.6279 seconds, 271 MB/s
You could write a script to do a variation on the above to report
progress say every 10 seconds similar to netstat.
Gus
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