SnapRAID - Disks - Replace a parity disk

Ensure the array is synced

If the disk is still accessible, first ensure to have a synced array running a sync command:

snapraid sync

Copy the big parity file to the new disk

A good copy command is ddrescue:

ddrescue /OLD_DISK/parity /NEW_DISK/parity /tmp/copy.log

NOTE: This will copy the parity file from the old to new location, and in case of errors, it will continue copying what can be copied.

Having a partial parity file, is still beneficial, as it will still allow to recover data as long it uses the valid part.

If the parity file is partially damaged or totally lost, try run the “fix” command to recreate it, but ensure to use the -d option to fix only the interested parity and not the other disks.
```
snapraid fix -d PARITY_NAME
```

Configure the new parity location in the configuration file.

Run sync again to make snapraid recognize the new disk.

snapraid sync

NOTE: This command will be almost immediate.