168Chapter H - GDT User's Manualby means of "link"; this device file has to be placed on a device of a GDT host drive.For example, on GDT controller 0 we have the host drive 1 which is HA 0, Target-ID 0,LUN 1 under Interactive Unix. The corresponding special device file is/dev/rdsk/c0t0dl1s0 (c0 = HA, t0 = Target-ID 0, d0 = LUN 0, s0 = Unix partition).By means of "ln /dev/rdsk/c0t0dl1s0 /dev/rgdth", the required special device file isgenerated.- A media change can be made with UNIX commands MOUNT and UNMOUNT. Pleasemake sure that the removable hard disk keeps its GDTSETUP drive number whenchanging the media, otherwise a separate ID/LUN entry is necessary for each singlemedia (since the drive number depends on the media and not the device containing it).- If you change the hardware configuration of your PCI computer system, it may happenthat the GDT is assigned to a different IRQ, as it was assigned during the installationand operation of UNIX. In this case you need to run the installation again, with a GDTdriver for the new IRQ, or change the hardware configuration so that the old IRQ isavailable for the GDT again.
