I installed this PCI-X controller below, but into a normal PCI slot, Adaptec AIC-7902W SCSI Controller Adapter Card PCI-X.... I then proceeded to conect the HDD's up, (4) 73GB 10K RPM Fujitsu Ultra320 SCSI/68-pin/LVD drives, it is a long cable that connects into the controller and at the end has the terminator. My OS is on a 74GB Western Digital WD Raptor with two more Seagate Barracuda 1TB drives. @ this point, I turned the machine on not sure what to expect, they are very loud, turbine sounding, but they were outside of the case, since I didn't know if they would work or not.. Not the hdd not working but the setup cause I knowing nothing about SCSI and plus the 7 drives in a normal size case. lights blink on and off at times on the scsi hdd's. The machine saw the controller and I was able to access the config utility, was telling me that 0:0 setup was something something wrong and when I clicked out and continued, Booting the controller Kernel,.....Controller started The messages below is how it ends. Following SCSI IDs are not responding: No Logical drives foud No Int 13 Drives to support BIOS not installed This is just one of my personal machines, no server or anything like that. Update : Removed controller, hdd's and now the system is back to normal. I like to know how to run the scsi setup, Would I notice a vast difference in speed compared to my hdd's now with no raid what so ever.