Linux dd Command Show Progress Copy Bar With Status
'm using dd command for block level copy and just found out that there's no built in way to check the progress. How do I use the Linux or Unix dd command while coping /dev/sda to /deb/sdb and display a progress bar when data goes through a pipe?
You need to use the pv command which allows you to see the progress of data through a pipeline. You need to install pv command as described here
|Requirements||dd and pv|
|Estimated completion time||N/A|
Once installed, type the following commands to see the status bar. Please note that if standard input is not a file and no size was given with the -s
option, the progress bar cannot indicate how close to completion the transfer is, so it will just move left and right to indicate that data is moving. It will also show average MB/s rate:
These examples may crash your computer and may result into data loss if not executed with care.
Copy /dev/sda to to /dev/sdb:
pv -tpreb /dev/sda | dd of=/dev/sdb bs=64M
pv -tpreb /dev/sda | dd of=/dev/sdb bs=4096 conv=notrunc,noerror
Fig.01: pv and dd in action
You can create a progress bar and display using the dialog command
(pv -n /dev/sda | dd of=/dev/sdb bs=128M conv=notrunc,noerror) 2>&1 | dialog --gauge "Running dd command (cloning), please wait..." 10 70 0
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Fig.02: Show the Status of dd Command in progress using pv and dialog command