AS/400e server SB3 203
AS/400e server SB3
• Uninterruptable Power Supply
The Model SB3 includes an internal battery that is automatically activated in the event of
utility power loss. The battery provides full operating power for a short time to all
components within the system unit, but not to any external components. This can allow
the system to run uninterrupted for a short time (30 seconds or less). For longer power
outages, the system will use the battery to attempt an orderly shutdown to avoid losing
data in main storage that is not written to disk. An external UPS is recommended to
protect the system unit and any external components against utility power outages.
Continuously Powered Mainstore (CPM) is not supported on the Model SB3. An external
UPS can allow the system to run uninterrupted for longer than thirty seconds when utility
power is lost. It can also maintain power long enough to ensure that the system
successfully completes a shutdown to avoid losing data.
The server SB3 is a Customer Setup system. Refer to “Customer Install Features (CIF)” on
page 229 for more information.
Card Technology
The new hardware completes the transition to PCI I/O architecture with the introduction of
PCI architecture in all the 8xx servers. This I/O structure enables customer setup of the
Model 820 and selected features on all models. It also enables Hot Plug PCI for adding and
replacing hardware without taking the server down.
With the implementation of new PCI technologies in the AS/400e server SB3 comes the
requirement for a better understanding of the configuration rules associated with the various
I/O features of the AS/400 system. Prior AS/400 models required input/output processors
(IOPs) to be in specific slots in the system and expansion towers. If high performance in
particular areas was required, a single input/output adapter (IOA) may have been assigned to
a single IOP. This resulted in unassigned slots in the tower, wasting valuable slots. The Model
SB3 provides more flexibility in the placement of IOPs and IOAs. This results in more efficient
use of card slots, potentially resulting in a lower cost of implementation. Increased flexibility
of configuration also adds a degree of complexity to the configuration process.
The following functions do not have equivalent function PCI cards for the Model SB3:
• ASCII Adapter
• V.25 Autocall cable
• Select standby mode
PCI adapters also do not support X.21 switched WAN dialup or Shorthold Mode WAN.
The fundamental bus architecture of the AS/400 system is unchanged when using PCI
adapters. The AS/400 IOP continues to off load the main processor; isolate the host from
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