>> With scsi, the disk address is determined by its physical >> connection to the scsi cable.
This is absolutely not correct. SCSI device IDs have always been programmed at the endpoint device via DIP switches, jumpers, or a dial. There was one short lived exception to this. In the late 1990s the industry created the SCAM extension, or SCSI Configured Automatically. This was an effort to make it easier for non technically savvy end users to install external devices such as scanners, optical drives, tape drives, without need to manually set device IDs. Cable proximity of devices was not involved in SCAM enumeration and assignment. It was a negotiated protocol. However, it was removed from the SCSI specification not long after introduction because it caused many more problems than it solved, specifically, it would change the boot hard drive ID and prevent systems from booting. It also wreaked havoc on software RAID systems when it auto reassigned IDs of the member drives, which obviously destroyed the array. I never fell victim to this because I didn't buy into the Adaptec hype. They started enabling SCAM by default in their controllers. I simply disabled it, and assigned IDs as I always had. A number of my colleagues did buy into the "easy install" hype and were bitten by it. -- Stan -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/5249d3a8.2030...@hardwarefreak.com
