Comment 23 for bug 278176

Just want to chime in to confirm what has been said so far. I experienced this some ubuntu releases ago (8.04, perhaps) with my Adaptec 39160. Fails to find root, big rootdelay helps.
I initially blamed this on ubuntu because my self-built kernels did not feature this. I always built the scsi driver into the kernel and also used root=/dev/sda2 instead of root=UUID=... .

Just recently I observed that the issue vanishes when replacing the dual-channel 39160 with a single-channel 29160 (I only used on channel anyway). So, is there some confusion with the initial scanning of two SCSI channels?
Perhaps the kernel reports that it's done only after one channel? But then, it apparently works when the driver is built into the kernel.