Just recently needed to tell Linux (2.4.18 on redHat 7.1SBE) to rescan the scsi buss for recently added luns, after looking around I’ve found this (Broken link http://www.garloff.de/kurt/linux/scsidev/) useful page with this (Broken link http://www.garloff.de/kurt/linux/rescan-scsi-bus.sh) handy little script which did the trick.