I dont see why each adapter has to have a unique host-id. To the machine each i/o kard has their own unique address to the cpu ( via memory partition, or io/address's ). I suppose it can be a problem if you have each scsi adapter become a part of the same scsi i/o buss. This is probably not the place to post scsi questions. I think that there is a SCSI news group for linux et al. /gat Ted Bennett wrote: > > We are writing a low level SCSI driver to manage multiple virtual adapters. > > On my Red Hat 7.1 system when the driver is loaded, SCSI mid-layer calls our > detect function and the number of adapters found is returned. SCSI then > begins to query each adapter. > > The roukproblem is that sometimes different adapters are assigned the same host > number. (ie. Two adapters (2 and 3) both called host number 2; Six adapters > (should appear as 2 3 4 5 6 7) are reported as hosts 2, 2, 3, 3, 4, 5).