also bear in mind that disk manufaturers gigabytes are 1,000,000,000 bytes, not 1,073,741,824 bytes. :-o
so your "4.3Gb" disk is only 4100.8Mb. 4.8Mb over the 4096Mb limit. :-D
4Mb isn't a big deal to loose.
just make sure your paritions add up to less than 4096Mb if you don't have any patch software or updated fastfilesystem installed.
:-)
as regards to a multidisk scsi setup... it'll have as many disks/partitions as you like on there.