Power - Asus DS300j G2 Series User Manual

o
verheatInG
Overheating is a potentially serious condition because the excessively high temperatures can lead to physical
drive failure and controller malfunction.
Overheating usually results from inadequate air circulation around the enclosure
i A c
nAdequAte ir irculAtion
Air circulation around the ASUS DS300f G2 enclosure might be a more complex problem. Use the thermometer
icons to help you locate the specific hot spot. Check for these conditions:
• Accumulated dust or objects blocking the fans
• Less than a minimum of 13 cm (5 inches) space between the back of the enclosure and the wall or other
object
• Ambient temperature above 35°C (95°F) where the subsystem is operating
• Failed Cooling Unit
To cool down an enclosure:
• Correct any problems identified above.
• Power it down and let it sit for an hour or longer.
See "Shutting Down the Subsystem" on page 58.
If a Cooling Unit must be replaced, do not remove the failed unit until a replacement unit is available. A hole on
the backplate created by a missing Cooling Unit affects air circulation which will cause controller units to overheat
and shut down. If a replacement Cooling Unit is not available, leave the failed unit in place until one is available.
See "Replacing a Cooling Unit" on page <OV>.
Important
In the event of a Cooling Unit failure, DO NOT remove the failed unit until there is a replacement
available and on hand. A single functioning Cooling Unit is adequate for cooling the system as
long as the failed Cooling Unit remains in place. Removing the failed unit without replacing it will
adversely affect airflow within the enclosure resulting in critical overheating and shutdown of the
enclosure.
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P S
ower uPPlIeS
ASUS DS300f G2 subsystems are equipped with redundant power supplies. The advantage of N+1 power
supplies is that should one fail, the other continues to power the subsystem until the faulty one can be replaced.
The subsystem is capable of operation on N power supplies.
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.
P f f
ower An Ailure
In the ASUS DS300f G2 subsystems, the power supply fans are used for cooling the power supply. When a
power supply fan fails, you must replace the power supply.
See "Replacing a Power Supply" on page <?> for more information.
b
atterIeS
The Cooling Units in the ASUS DS300f G2 subsystem use a battery for backup power to protect data in 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 corrects a marginal or failed condition. The battery is located
inside the Cooling Unit housing. To replace a battery, first replace the Cooling Unit with the battery that needs to
be replaced. See "Replacing a Cache Backup Battery" on page <?> Also see "Reconditioning a Battery" on page
<?>.
DS300f G2 Series User Manual