Promise Technology 2-Year Extended Warranty for VessR2000 RAID Head - Manual (Page 652)

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Product Manual Troubleshooting
one is available. See “Replacing a Cooling Unit”
See “Shutting Down the Subsystem” on page 110 .
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Vess R2600 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.
See “Replacing a Power Supply” on page 539.
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In the Vess R2600 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 539.
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The Cooling Units in the Vess R2600 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” and “Reconditioning a Battery” on page 120.