{{tag>snapraid linux}}
======snapraid======
I have been using snapraid the past 8 years or so for my main first past redundancy.  I have a second home server used as a backup server that weekly backs up using [[home_server:home_server_setup:other_services:back-up_server#restic]].

The main snapraid commands I use are:
''sudo snapraid sync'' to sync the files that have changes since last sync.  I usually do this weekly, manually.
''sudo snapraid scrub'' to check the parity of the array, usually the oldest files first.  I usually do this weekly, manually.
''sudo snapraid status'' to check the status of the array.  I usually do this weekly, manually.
''sudo snapraid touch'' to add sub-second time granularity to the files that improves snapraid usage.  I usually do this weekly, if reported as requried by status, manually.
''sudo snapraid smart'' to check the smart status of the array drives (does not report on nvme drives).  I usually do this weekly, manually. Really for information only.

Snapraid allows files and directories that have been deleted since the last sync to be recovered.

  *''snapraid diff --test-fmt path''
  *''snapraid diff --test-fmt disk'' This will let you know the data disk from snapraids array perspective
Snapraid does not expect you to provide the absolute file system path when fixing files.
  *''snapraid fix -m'' This will recreate any deleted file in the entire array
  *''snapraid fix -m -d d1'' This will recreate any deleted file on data disk d1
  *''snapraid fix -m -f Example/'' This will recreate the contents of any folder named Example anywhere in the array
  *''snapraid check -m -f Example/ -v'' If you are unsure what will happen you can replace fix with check above and add -v with this. Snapraid will then tell you that there is a problem with each of the files matching the filter or that they are ok.


The main snapraid configuration file ''/etc/snapraid.conf''


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