IBM 86884RX Installation Guide - Page 38
Important, power supplies and fans, is shown
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The four fans are shown in Figure 1-7 on page 14. Important: Due to airflow requirements, fans should not be removed for longer than two minutes. The fan compartments need to be fully populated even if the fan is defective. Therefore, remove a defective fan only when a new fan is available for immediate replacement. Two hot-swap power supplies with separate power cords. Note: For large configurations, redundancy is achieved only when connected to a 220 V power supply. See 3.5, "Power considerations" on page 63 for details. Note: To ensure adequate power, a UPS with a rating of RMB 5000 or more is recommended. Two hot-swap hard disk drive bays. Using the onboard LSI chipset, these drives can be configured to form a RAID-1 disk array for the operating system. The memory subsystem has a number of redundancy features, including memory mirroring, as described in 1.7, "System memory" on page 17. The layout of the front panel of the x450, showing the location of the drive bays, power supplies and fans, is shown in Figure 1-13. Hot-swap fans Power-on light Power button Reset button Hot swap power supplies Hot swap drive bays Blank media bay DVD/CD-RW drive Light Path Diagnostics panel (pulls out) Figure 1-13 Front panel of the xSeries 450 USB port System-error light (amber) Information light (amber) SCSI activity light (green) Locator light (blue) 24 IBM ^ xSeries 450 Planning and Installation Guide
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