H01650 - SYSTEM HANG WITH ADAPTEC 3940 CARDS IN SLOT 1 & 2 SYMPTOM: IBM PC 300 Series 6577 and 6587 may exhibit a system hang condition after executing the POST test and loading the Adaptec BIOS code for an Adaptec AHA-3940 PCI Multichannel SCSI Host adapter. PROBLEM ISOLATION AIDS: The failure is due to having two Adaptec 3940 SCSI adapters in slots 1 & 2 (lower two slots) on the riser card. When this adapter is installed in pairs in slots 1 & 2, both cards are forced to use the same interrupt which creates a conflict. FIX: Placing the adapters in slots 1 & 3 or 2 & 3 will eliminate this failure. - OR - Obtain the version 1.13 or higher BIOS update for the Adaptec AHA-3940 PCI SCSI adapter. The update may be downloaded from the Adaptec BBS at 408-945-7727 or through the Internet at the following URL: "http://www.adaptec.com/techsupp/bbs_eprm.html" Adaptec AHA-3940 is a trademark of Adaptec, Inc.