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Components
Figure 10
CompactFlash card
Supercapacitor pack
To protect controller module cache in case of power failure, each controller enclosure model is equipped
with supercapacitor technology, in conjunction with CompactFlash memory, built into each controller
module to provide extended cache memory backup time. The supercapacitor 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 is automatically committed to disk media when power is restored.
In the event of power failure, while cache is maintained by the supercapacitor pack, the Cache Status LED
flashes at a rate of 1/10 second on and 9/10 second off.
Do not remove
Used for cache recovery only
Controller module pictorial
CompactFlash card
(Midplane-facing rear view)
Host interface
USB - Type A
(shown covered)
Summary of Contents for AssuredSAN 4544
Page 8: ...8 Figures ...
Page 10: ...10 Tables ...
Page 14: ...14 About this guide ...
Page 50: ...50 Connecting hosts ...
Page 52: ...52 Basic operation ...
Page 70: ...70 Troubleshooting ...
Page 90: ...90 Electrostatic discharge ...
Page 94: ...94 USB device connection ...
Page 96: ...96 SFP option for CNC ports ...
Page 100: ...100 Index ...