RAIDiator 4.1.9 (sparc) Time Machine Failing to Find Disk?

mdgm wrote:

With the Ultra 4 Plus, I suggest you put one disk in the NAS and do a factory default (wipes all data, settings, everything). I would suggest you update to 4.2.16 (http://www.readynas.com/RAIDiator_x86_4_2_16_Notes) if the unit comes with 4.2.15 or older firmware; then update to the latest firmware. After verifying the updates have been successful, then I'd suggest you power down, put the rest of the disks in and do a factory default (wipes all data, settings, everything) via the Boot Menu (http://www.readynas.com/kb/faq/boot/how_do_i_use_the_boot_menu) which will give you a clean setup on the latest firmware. Do note that you can't migrate your array from the NV+ to the Ultra 4 Plus due to the different RAID format, so it's best to buy new disks from theHCL for your NAS.

Excellent, thanks for the above info, it's genuinely appreciated. Tell me, what's the rational for upgrading to 4.2.16 before going to the latest firmware? Why wouldn't I go directly to the latest stable release? Not that I'm overly fussed about going to the intermediate version, just curious as to why.