About filer main unit components
Two kinds of components
The filer main unit has two kinds of components: internal components that enable it to function, and slots and ports that connect it to networks and disk shelves.
Internal filer components
The following internal components enable the filer to function.
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Component
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Description
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System board
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The system board is the main board of the filer. It has upgradable firmware. All components are connected to the system board.
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System memory
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System memory stores information temporarily.
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NVRAM (Nonvolatile Random Access Memory)
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Data ONTAP uses NVRAM to log network transactions as a data integrity measure. In case of a system or power failure, Data ONTAP uses the contents of NVRAM to restore network data to disk.
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Diskette drive
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In an emergency and for major upgrades, Data ONTAP uses the diskette drive to boot from diskettes.
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LCD and LEDs
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The filer displays status information on the LCD and LEDs.
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Environmental adapter
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The environmental adapter performs the following functions:
- Monitors the filer's temperature and fans
- Sends critical information to the filer's LCD
- Logs information
- Shuts down the filer if its temperature is beyond a critical range or the fans cease operating
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Slots and ports
The filer has slots for external connections and ports for a console and diagnostic hardware.
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Component
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Description
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Slots
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The filer contains expansion slots for network interface cards, tape drive adapters, and disk shelf adapters.
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Serial ports
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The two serial ports are as follows:
- The console port connects to the filer a serial terminal that you can use as a console.
- The diagnostics port connects diagnostic equipment such as the environmental monitor unit (EMU) of a StorageShelf 2 storage shelf.
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Copyright © 1999, Network Appliance, Inc. All rights
reserved.
Part No. 210-02334
File: intro2.htm
Last updated: 04/26/99 08:11:09