Therefore, IBM recommends that the x440 be connected to a 220 V power source to ensure power supply redundancy for large configurations.

Tip: If power is not redundant, the Nonredundant LED will be lit in the Light Path Diagnostic panel (see Figure 1-14 on page 26.

Two system power-cord connectors are available on the back of the x440, one for each of the power supplies. Connect each of these power connectors to separate power circuits to ensure availability if one circuit should fail.

The x440 ships with two 2.8 m/9 ft. IEC 320-C13 to IEC 320-C14 power cables for intra-rack power distribution. Models shipped in the US also include two 2.8 m/9 ft. IEC 320-C13 to NEMA 6-15P power cords for attachment to high-voltage power sources.

3.9 Solution Assurance Review

Some level of Solution Assurance Review (SAR) should be performed for all IBM solutions. The level of SAR (self, peer, or expert) should match the complexity of the solution. For example, simpler solutions may need only a self review.

However, a combination of the customer environment risk combined with the complexity of the solution may require that an expert level SAR take place, facilitated by a Quality Assurance practitioner and supported by a team of technical experts.

Note: The EXAct Business Partners themselves may be required to perform the Solutions Assurance Review.

If a solution contains four or more Enterprise X-Architecture servers (currently x360 and x440), then an expert SAR is mandatory.

For further information on what is required, refer to the above Solution Assurance Web sites. EMEA and Americas information is available. Procedures for Asia Pacific countries are currently in development.

Trigger Tool

The SAR Trigger Tool provides a recommendation on the level of quality/Solution Assurance that will be required. It is available from one of the URLs above.

The three levels are:

￿Expert

For technically challenging, high-risk solutions

104IBM ^xSeries 440 Planning and Installation Guide

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IBM 440 manual Solution Assurance Review, Trigger Tool