Grounding Checks; System Configurations; Data Security - IBM 5147-084 Installation And User Manual

Important: When more than one PSU is fitted, connect each PSU to separate and independent supplies to
guarantee redundancy.
CAUTION:
Always remove the power connections before you remove the PSU from the enclosure.
DANGER:
Multiple power cords. The product might be equipped with multiple power cords. To
remove all hazardous voltages, disconnect all power cords. (L003)

Grounding checks

The product must only be connected to a power source that has a safety electrical ground connection.
DANGER
If one or more 5U enclosures go into a rack, the importance of the ground connection to the rack
increases, because the rack will have a larger "EARTH LEAKAGE CURRENT" ("TOUCH
CURRENT").
Examine the ground connection to the rack before the switch-on: an electrical engineer who is qualified
for the appropriate local and national standards must do the examination.
DANGER
HIGH LEAKAGE CURRENT. Earth connection essential before connecting supply.
For more information, see "Electrical safety" on page 5.

System Configurations

For a proper ESS system configuration, review the ESS Deployment Guide and Spectrum Scale RAID
Administration Guide.

Data security

Precautions can help preserve data security.
v Power down your host computer and all attached peripheral devices before beginning installation.
v Each enclosure contains up to 84 removable disk drive modules. Disk drives are fragile. Handle them
with care, and keep them away from strong magnetic fields.
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Chapter 3. Installation