Is there a limit to the number of hard drive partitions NetBSD-mac68k will recognize?
Yes, NetBSD/mac68k follows the UNIX tradition of having only 8 partitions per disk. Increasing this limit will be quite an effort, but it is a project in the works for NetBSD 1.4. This limit causes a problem for older kernels, since NetBSD would not check more than the first 8 partitions to see if they contained usable filesystems. Since the Apple drivers and partition maps among other partitions often lie at the front of the disk, NetBSD partitions could have been overlooked. However, more recent kernels (definitely NetBSD 1.2 and later) will scan the first 32 partitions on the disk for NetBSD partitions. This should take care of most people’s problems. Keep in mind that the partition lettering scheme only allows for about 6 usable partitions (i.e. a, d, e, f, g, and h; b is designated as swap and c is the raw disk interface).