ZFS allocation units

This feature introduced in Solaris 11 SRU 30 is really an interesting one. It’s nothing you should really need often because usually ZFS will do the right thing when it works with your disk devices. However there are devices that “lie” about their block sizes, for example telling the world they are 512 sector devices, but in reality they would prefer writes and reads aligned to different boundaries. Those devices did and do this for a reason, as 512 Byte boundaries is still the baseline everyone can work with.

For more details, please visit: http://www.c0t0d0s0.org/2021-03-06/allocation-units