2. Should i use IDE- or SCSI-disks for my NetWare server?

IDE-disks work fine with NetWare, but on newer hardware problems have been reported on slow VM's when using IDE-disks. Therefor the best disk to use is an SCSI-disk.

You can use the VMware Buslogic SCSI-adapter for your NetWare disks. Use this driver BLMM3.HAM (download) from NetWare 5.1. You can also use this driver in NetWare 6.