Hp-Fl Subsystem Considerations; Number Of Disk Drives; Cio Slots; Channel Contention - HP 27115A Installation Manual

HP-FL Subsystem
Considerations
Number of Disk Drives
CIO Slots
Note
Channel Contention
Identification
1-6 Generallnformation
There are various subsystem considerations associated with installing the HP-FL
PCA that will affect system operation and performance.
The HP-FL software can control as many as eight disk drives through a single
HP-FL PCA. However, your computer or installation may limit this number to six
or fewer. See your system manuals for details.
The total number of CIO slots available for general device adapters depends on
the computer, and whether it supports additional CIB channel adapters or
extenders. Depending on the system, each channel adapter supports from 5 to
14 CIO slots. However, you must install the HP-FL PCA in one of the eight
lowest-numbered slots in any given CIB.
Install the HP-FL PCA in one of the slots numbered from 0 to 7 in any CIO bus.
As noted above, some systems have more than one CIB. With a host with
multiple CIO buses and more than one HP-FL PCA, divide the PCAS among the
CIO buses to minimize channel contention problems. For instance, with two
HP-FL PCAs and two CIO buses, put one PCA on each bus.
The HP-FL PCA is identified on two labels affixed to the card. For example, the
labels might look like this:
27115-66666 21
2823A56789 DIV
A-4321 52A654321 MADE IN U.S.A.
52
Figure 1-4. Example peA Identification Stickers
Do not remove the labels. Record this information in a convenient place, such
as your system logbook, for use when discussing the device adapter with HP
factory and support personnel.