Apple Xserve Einstellungsanleitung PDF herunterladen (Seite 6)

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Xserve RAID Basics

Features

Power Supplies

Xserve RAID includes two redundant power supplies, each with an AC power connection.

When one power supply is not operational, the other provides power for the entire system.

You can replace or install a power supply while the system is running. If one power supply

is removed from the system, it must be reinstalled or replaced with a working one as soon

as possible to prevent the drive modules from overheating.

Cooling modules

Xserve RAID includes two redundant cooling modules. If one cooling module is not

operational, the other provides cooling for the entire system. You can replace or install a

cooling module while the system is running. If one cooling module is removed from the

system, it must be reinstalled or replaced with a working one as soon as possible to avoid

an over-temperature condition, which causes the system to shut down.

Backup Batteries

Xserve RAID may include up to two optional, redundant backup batteries, which protect

data in the controllers’ cache in the event of a power interruption. The Xserve RAID power

supplies charge the battery modules when they are installed in the system. The batteries

can be replaced or installed while the system is running.

To check a battery’s charge when the module is out of the system, press the button on the

underside of the module. All four green LEDs light when the battery module is fully

charged. You can also use the monitoring or admin software to determine the battery’s

charge. See “Remote Monitoring” in the Troubleshooting chapter.

For proper operation of the battery, check the status lights on the front of the module. See

“Status Lights” in the Troubleshooting chapter.

Host Adapter Card

The Apple Fibre Channel card is a 7-inch PCI card designed for use with Xserve RAID

systems. The card is installed in a host system so that it can connect, using one or two

ﬁbre channel cables, to the controller cards in Xserve RAID. The host card provides ﬁbre

channel communication in both directions simultaneously at up to 2 gigabits per second

(Gb/sec). If the card is used in an Xserve, it must be installed in the top PCI slot of the

dual-slot riser card.

If host adapter cards are installed in each of two host systems, they can both connect to

the same Xserve RAID: one host to the top controller card (for access to the left seven

drives) and the other host to the bottom controller card (for access to the right seven

drives).

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Apple Xserve Einstellungsanleitung Seite 6