The more disk you had, the longer it took. It walked the scsi bus which took forever. So if you had more disk. It took even longer.
Since everything was remote, you’d have to call hands and they weren’t technical. Also no cameras since it was the 90’s.
Now when I restart a vm or container. I panic if it’s not back up in 10 minutes.
I think mine takes like 2 minutes. It’s ten years old. I’ve putting off upgrading to the cost of videos cards
It isn’t a disk driver since the OS is not loaded yet. It is the hardware identifying each disk in the SCSI chain. Not sure what else it was doing walking the bus much I know finding all the disk was the longest part.