CompuServe Messages

Keith, The A2090(a) handles multiple SCSI drives just fine…I've got 2 on one right now. You are talking about setting LUNs (Logical Unit Numbers)…a couple of things here. First, the A2090 driver software doesn't support LUNs, but 2nd, even if it did support LUNs, you're not using them right. On the SCSI bus, there can be a total of 8 devices attached directly to the bus…the host adapter card (the A2090) counts as one device. Of those 7 remaining devices, each must have a unique SCSI ID that will be between 0 and 7 (the host adapter again takes one of those numbers…usually 7 or 0). Then, if the software/hardware combination supports LUNs, one of those devices attached to the SCSI bus can have multiple devices attached to itself. Those devices would have unique LUN's for that device. That is…at SCSI ID 6, you could have LUN 1, LUN 2 and so forth, you could also have a LUN 1 and LUN 2 at SCSI ID 5. In fact, every devices on the bus has at least one LUN #…LUN 0 for the first device at that SCSI address. Since those drives you have each represent a separate "tap" on the SCSI bus…they need to have their SCSI ID set so they're different. If you're familiar with the older IBM style hard drives and hooking them up…setting SCSI ID is much like setting the DRIVE ID on thos older drives. Also, the SCSI bus must be properly terminated. The last drive on the bus must have it's terminators installed, drives in the middle must have them removed. Don