APC RAID Subsystem SCSI-SATA II Specifications Page 38

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Figure 2-11: Drive Tray Key-lock Rotation
WARNING!
All the drive trays must be installed into the enclosure even if they do not contain a
hard drive. If the drive trays are not installed, then the ventilation required for
cooling will not be normalized and the subsystem will be irreparably damaged.
2.9. Optional BBU Installation
If your order includes an optional BBU, it should be installed before you power on your
subsystem. Due to safety concerns, the BBU module (containing several battery cells) is
shipped in a separate package. The BBU can be added online; however, you need to reset
the subsystem for the new module to function. It is best to install a BBU during the
initial setup. To install a BBU module, please follow these steps:
Step 1. Remove the BBU dummy cover from the subsystem by loosening its
spring screw, and then gently retrieve the cover from chassis. A
Phillips screwdriver is required.
2-14
Optional BBU Installation
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