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IBM eX5 Implementation Guide
ROM execution order
Regardless of whether you are booting in Legacy Only mode or UEFI mode, you can control
from which device you want to boot. This capability is important when multiple storage
adapters are installed in the server.
To control the boot sequence from within F1-Setup, select System Settings
Device and
I/O Protest Option ROM Execution Order. Figure 7-24 shows what the panel looks like after
pressing Enter on the list of possible choices. Use the up and down arrow keys to select a
specific entry to move and use the plus or minus keys to move the item up or down in the list.
Figure 7-24 Set Option ROM Execution Order maintenance panel
7.6 Power supply considerations
The System x3690 X5 ships with two power supplies that will support a single processor, the
system board memory, and all of the PCI slots, except when a high-performance video card is
installed.
If you plan to install a high-performance video adapter, or the second processor and the
mezzanine memory board, you must install the optional HE Redundant Power Supply Kit,
part number 60Y0327, plus another optional power supply, part number 6070332. Installing
these parts means that you will then have four power supplies inside the server. Without
these options installed, the server will report the following warning in the system event log:
“Non-redundant: Sufficient Resources for Redundancy Degraded”
The MAX5 also has two power supplies. If power fails in the MAX5, the server will power off.
Powering the server back on will not be possible unless the MAX5 has power or until both QPI
cables have been disconnected from the server, after removing the ac power from the server.
Ensure that both the MAX5 and the server to which it is attached are plugged into the same
common power sources.
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