DataDirect Networks EF3015, Руководство по установке

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The EF3015 System Components
E F 3 0 1 5 S e t u p G u i d e ( R e v A )
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1.5 CompactFlash
During a power loss, data stored in cache are saved off to non-volatile memory
(CompactFlash). These data are restored to cache, and then written to disk after the issue is
corrected. CompactFlash
(Figure 1)
provides unlimited cache memory backup time. To
protect against writing incomplete data to disk, the image stored on the CompactFlash is
verified before committing to disk.
NOTE : Customer removal of CompactFlash will void the product warranty.
1.6 Super-Capacitor Pack
To protect controller module cache in case of power failure, each controller enclosure
model is equipped with super-capacitor technology, in conjunction with CompactFlash
memory, built into each controller module to provide unlimited cache memory backup time.
The super-capacitor pack provides energy for backing up unwritten data in the write cache
to the CompactFlash, in the event of a power failure. Unwritten data in CompactFlash
memory are automatically committed to disk media when power is restored. In the event of
power failure, while cache is maintained by the super-capacitor pack, the Cache Status LED
flashes at a rate of 1/10 second on and 9/10 second off.
CompactFlash
Figure 1. Compact Flash on Controller Module