The original post: /r/datahoarder by /u/manzurfahim on 2025-04-15 12:48:40.

I am running disaster recovery tests and took out a 16TB drive out of the RAID 6 array (LSI MegaRAID 9361-8i controller, 8 x 16TB WD DC HC550 drives in RAID 6), and replaced it with another drive. It had 6.58 TB free out of 87.3 TB.

Rebuild took 21 hours and 13 minutes. Is this a good rebuild time? The controller has a dedicated processor to do parity calculations and stuff, but the controller is old. Can a newer controller rebuild an array quicker or is it ultimately depending on the HDD speed?