Chapter 2. Unpacking and Installation
EK–SMCPP–UG. A01
2–33
Additional rules for configuring SCSI buses include:
1. All devices and ports in the same column are on the same SCSI bus or port.
2. All devices in the same row (device shelf) have the same device address.
3. Devices installed must be listed in the HSOF Ultra 70 Solutions Software
SPD.
4. Device address 4 and 5 are used only when the disk drive SBB has a device
address switch.
5. Device addresses are determined by the backplane connector into which the
device is inserted unless the SBB has a device address switch.
6. For the addressing of SBB disk drives on the SCSI bus, device addresses for
each SBB in each extender cabinet are determined by the PVA address. The
main cabinet’s PVA address is set to PVA address 0 and device addresses in
that cabinet have addresses 0 through 3. The PVA address in the first
extender cabinet is set to PVA address 2 and device addresses in that
extender cabinet have addresses 8 through 11. The PVA in the second
extender cabinet is set to PVA address 3 and device addresses for that
extender are from 12 through 15. Figure 2-21 helps to illustrate the
addressing scheme.
Figure 2-21 shows the six Ultra Wide SCSI buses and their associated ports and
device addresses.
