IBM TotalStorage DS4500, User Manual

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v
When a battery fails, the fault light on the battery is lit. For more information
about indicator lights, see “Battery indicator lights” on page 30.
v If you replace the battery and still experience battery problems (for example, loss
of battery power to the controllers or batteries not charging properly), the DS4500
Storage Server might have defective components or connections. Check the
storage-management software for indications of other component failures.
Replacing a failed battery
When instructed by the storage-management software, replace the battery.
Attention: Because the battery CRU is a sealed unit, you must replace the entire
CRU (not just the batteries) in order to keep the battery backup system in working
order. Opening the battery CRU voids your warranty.
1. Use the storage-management software to disable caching. Caching is disabled
when the Cache active (Fast write cache) indicator light is off. Data in cache is
unprotected if a power outage occurs while the battery CRU is out of
operation.
Attention: When you handle static-sensitive devices, take precautions to
avoid damage from static electricity. For details about handling static-sensitive
devices, see “Handling static-sensitive devices” on page 43.
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.
2. Remove the DS4500 Storage Server bezel, as shown in Figure 21 on page 21.
Attention: Be careful when you remove the battery. The battery weighs
approximately 6.4 kg (14 lb).
3. Using Figure 36 on page 48 as a guide, remove the battery.
a. Loosen the four captive screws on the battery. If necessary, use a flat
blade screwdriver to loosen the screws.
b. Using both pull handles, slide out the battery about 5 cm (2 in.).
c. Using both hands, grasp the sides of the battery and pull out.
Chapter 3. Replacing the DS4500 Storage Server components
47