SnapRAID - Synchronize

sudo snapraid sync

WARNING: This process can take a very long time (hours to days), depending on the size of your data.

  • Once completed, SnapRAID will have recorded parity data, allowing the recovery of files if a drive fails.

NOTE: This command updates the parity information.

  • All the modified files in the disk array are read, and the corresponding parity data is updated.

This process can be stopped at any time by pressing Ctrl+C, without losing the work already done.

  • At the next run the “sync” process will start where interrupted.

If during the process, silent or input/output errors are found, the corresponding blocks are marked as bad.

Files are identified by path and/or inode and checked by size and time-stamp.

  • If the file size or time-stamp are different, the parity data is recomputed for the whole file.
  • If the file is moved or renamed in the same disk, keeping the same inode, the parity is not recomputed.
  • If the file is moved to another disk, the parity is recomputed, but the previously computed hash information is kept.

The “content” and “parity” files are modified if necessary.

  • The files in the array are NOT modified.