Crashplan: backing up network shares – the easy way.

We’ll, this seemed a lot easier than I thought it would be. There is “unsupported” guidance on Crashplan’s site, here (which is over-complicated) and the actual answer here (by the user “ForcePush”).

I have given up on the headless QNAP / crashplan approach due to the Windows component auto-update, constantly breaking the backup. I now have a Windows file server, but certain files remain on the QNAP. Creating a standard mapped network drive doesn’t work, as the CrashPlan agent cannot see it. It has to be created using the special SYSTEM account. Here’s how:

  1. Get a copy of PsTools from Microsoft, install / extract and navigate to them from CMD.
  2. Run psexec -i -s cmd.exe
  3. In the new CMD window, map the drive with the following command:

net use W: \\{host}\{share}  /user:host\admin /persistent:yes

(where {host} is the hostname of your QNAP / file server and {share}, well, is the share. You can choose any drive letter, I went for W:)

  1. Open the CrashPlan agent > Backup > files (area) and click Change… You should see the new mapped network drive.

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