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1-4 Dell PowerVault 720N, 740N, and 760N System Administrator and Command Reference Guide
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The filer has slots for external connections and ports for a console and diagnostic
hardware, as shown in Table 1-4.
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System board The system board is the main board
of the filer. It has upgradable firm-
ware. All components are connected
to the system board.
System memory System memory stores information
temporarily.
NVRAM (Nonvolatile Random Access
Memory)
Data ONTAP 5.3 uses NVRAM to log
network transactions as a data integ-
rity measure. In case of a system or
power failure, Data ONTAP 5.3 uses
the contents of NVRAM to restore
network data to disk.
Diskette drive In an emergency and for major
upgrades, Data ONTAP 5.3 uses the
diskette drive to boot from diskettes.
LCD and LEDs The filer displays status information
on the LCD and LEDs.
Environmental adapter 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 tem-
perature is beyond a critical
range or the fans cease
operating