Installation Design - HP 27115A Installation Manual

Installation Desig n
Note
Caution
This section describes supported computer-to-disk connections.
Connecting two or more computers to a single disk cluster is not supported.
Although the hardware connection is possible, software for multiple computer
disk sharing is not available.
Figure 1-3 shows two
HP-FL
device adapters and disk clusters. The number of
HP-FL
device adapters that can be installed depends on the particular computer
system, number of HP
CIO
channels, and available I/O card slots. Consult your
computer system installation and configuration manuals. If your installation
requires more than one
HP-FL
link, be sure to divide them evenly among the
available
CIO
buses.
No
CIO
bus may have more than two
HP-FL PCAS
More than two
HP-FL
device
adapters will cause
CIO
channel contention and may overtax the power supply
on your computer or extender. See table 1-2 for the power requirements for the
HP-FLPCA.
Notice that, with a single drive attached to an
HP-FL
device adapter, two PBus
terminators are installed on that
driv~.
Where there are multiple drives, one
terminator attaches to the drive where the fiber cable connects. A second
terminator attaches to the last drive in the chain, and the PBus cables connect
the controller (in the first drive) in series to the other drives. Your disk drive
installation manual will have detailed instructions for installing the PBus
terminators.
PBus
terminL
Disk
Driv
Figure 1-3. Connection to Disk Clusters
Generallnformation 1-5