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After unmounting your disks, click on the CardBus symbol and select Power off Card, see
below:
Figure 26: Powering Off Your SeriTek/1SM2
Connecting and Immediately Removing External Hard Drive(s)
If you connect an external hard drive, then remove it without acknowledging it has been
added to the system, a dialog box will appear that explains no new hard drive(s) were
detected (See Figure 27).
Figure 27: Connecting and Disconnecting an External Hard Drive(s)