Cat Greenwoods :
noidea_77 :
The BIOS or driver may provide a value for the spin-up time for the disks. B< increasing that a little, the adapter gets more time to find the disks an assemble the raid.
During post, the RAID array seems to appear to be functioning normally every single time, so I it seems the array is all spun up already. Can you explain why waiting even more time will help?
Because the adapter first sends a spin command to all disks, waits for X seconds, identifies the disks, reads the boot record, assembles the raid and at the end tells windows about it. Seeing the disks doesn't mean the raid is fully recognized. It's working after a reboot, because the disks are already spinning.