Excited for you! I’m going from 1x 12tb USB drive to 4x internal 18tb drives. I’m building the NAS from scratch and keeping my other server for its current services (mostly Plex). My parts have been defective though, so it’s all just sitting waiting for a replacement mobo.
It was similar for me. From a single USB 12TB drive, to an old Qnap with 4x4TB drives, to a (now) revived Synology NAS with 4x18TB drives. I have several “servers” but they are USFFs with no room for so many drives.
What’s a data scrubber?
It’s a data maintenance feature that amends data in storage pools that are incorrect or incomplete. It works on BTRFS volumes or RAID 5/6 storage pools. It’s scheduled to run monthly on my NAS. I guess it started now as I upgraded my drives from 4x4TB to 4x18TB.
It scrubs your data
When initializing a new array, it’s a (usually optional) process of zeroing out the newly added disks. Sometimes it’s required as part of calculating parity across the array (redundancy data).
