On Wed, Jul 28, 2021 at 11:03:01PM +0200, deloptes wrote: > Dan Ritter wrote: > >> Raid6 sounds promising. Equivalent capacity is also one drive? > > > > No, you actually get about 2 drives of capacity out of 4 here. > > You get N-1, so from 4x2TB disks you get close to 6TB RAID6 (you have also > various FS layer overhead)
RAID-5 is N-1. With 4 disks in a RAID-5 configuration, you'd get 3 disks worth of usable storage. RAID-6 is N-2. With 4 disks in a RAID-6 configuration, you'd get 2 disks worth of usable storage.
