IBM TotalStorage DS4100, Installation, User'S, And Maintenance Manual

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AC power connectors
This connection is for the ac power cord.
Strain-relief clamp
Use this clamp to provide strain relief on the power cord. Secure the clamp
tightly with the power-supply clamp-nut.
Removing a power supply
Statement 8:
CAUTION:
Never remove the cover on a power supply or any part that has the following
label attached.
Hazardous voltage, current, and energy levels are present inside any
component that has this label attached. There are no serviceable parts inside
these components. If you suspect a problem with one of these parts, contact
a service technician.
To remove a hot-swap power supply, perform the following steps:
1. DS4100 single-controller storage server only:
If you are replacing a working (non-failed) power supply on a DS4100
single-controller storage server, you must stop all I/O activity and turn off power
to the storage server before replacing the power supply. Go to “Turning off the
storage server” on page 67 and follow the procedure described there before
proceeding with the following steps.
If you are replacing a failed power supply on a DS4100 single-controller storage
server, you do not need to power down the storage server before replacing the
failed power supply.
2. Turn off the ac power switch. See Figure 67 on page 92.
Chapter 5. Installing and replacing components
91