Table4. Configuration rules (continued)
System or expansion unit Configuration rules
iSeries 830 vThe 830 can have a maximum of 13 expansion units on
four HSL loops.
vConnect HSL loops to the 830 in this order(see
AppendixB, “Connector Locations”on page 35):
1. B0 and B1
2. C0 and C1
3. D0 and D1
4. A0 and A1
vConnectors A0 andA1, can have one 5074.
vConnectors B0 and B1; C0 and C1; D0 and D1, can have
up to four expansion units.
vThese rules apply for all expansion units except
migration units which always go on A0 andA1.
iSeries 840 vThe 840 can have a maximum of 23 expansion units.
vThe 840 can have a maximum of eight HSL loops.
vEach HSL loop can have a maximum of four expansion
units.
iSeries 890 vThe 890 can have a maximum of 47 expansion units.
vThe 890 can have a maximum of 32 external xSeries
servers.
vThe 890 can have a maximum of 12 HSL loops on a
24–way and 14 HSL loops on a 32–way.
vThe 890 can have a maximum of five external xSeries
servers per loop.
Powering down your iSeries system unit
Youneed to power down your system unit before you can connect your new
expansion unit to it. Follow the steps below to power down your system unit.
__ 1. Ensure that you have a current backup of your operating system and
licensed programs. If you have backed up the operating system and licensed
programs since the last time you applied program temporary fixes (PTFs),
that backup is acceptable.
__ 2. If you have installed logical partitions on your system unit, refer to Logical
partitions in the iSeries Information Center.IntheiSeries Information Center you
can find instructions on powering down a system with logical partitions.
__ 3. Ensure that all jobs are complete.
__ 4. When all jobs are complete, type pwrdwnsys *immed on an command line and
press the Enter key.
Note: If you encounter difficulties during the installation, contact your authorized
dealer or service provider.
__ 5. After your system unit has completely powered down, power off all PCs
and devices, such as printers and display stations, that are connected to the
system unit.
__ 6. Unplug any power cords, such as for printers, expansion units, and display
stations, that are connected to the system unit.
__ 7. Unplug the power cord for the system unit from the electrical outlet.
6Setting up your 0578, 5074, 5078 or 5079 Expansion Unit V5R2