VTrak E-Class Product Manual
344
Power Supplies
VTrak subsystems are equipped with redundant power supplies.
The advantage of dual power supplies is that, should one fail, the
other will continue powering the subsystem until the faulty one
can be replaced. The subsystem is capable of operating on a
single power supply. As a result, if one power supply fails you
must watch the front panel LEDs or WebPAM PROe in order to
become aware of the condition.
The power supplies are hot-swappable, meaning you can leave
the subsystem running when you replace the bad one. Be careful,
however, to remove the faulty power supply and not the good
one, or the subsystem comes to an immediate stop and your data
is unavailable until the subsystem is powered and booted again.
As noted above, if a power supply fan fails, you must replace the
power supply. Without the fan to cool it, the power supply
overheats and eventually fails anyway.
No tools are required for the procedure. See “Replacing a Power
Supply” on page 259.
Battery
VTrak subsystems use a battery as backup power for the cache.
Should a power failure occur, the battery enables the cache to
hold data up to 72 hours. The battery recharges during normal
subsystem operation.
In most cases, installing a replacement battery will correct a
marginal or failed condition. The battery is located in the cooling
unit above the controller. Remove the cooling unit for access. The
battery is hot-swappable.
No tools are required for the procedure. See “Replacing a Cache
Battery” on page 265.
Also see “Reconditioning a Battery” on page 128 or page 183.
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