My external hard drive will no longer connect to my macpro......any ideas on how to solve this problem??

My external hard drive will no longer connect to my macbook pro via FW800........Any ideas on how to solve this??

Reset the SMC, see this Apple note: http://support.apple.com/kb/HT3964
Also reset the PRAM:
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.
In most cases, those two actions will fix the port issue. If it's still an issue, you may need to see if the external hard drive can connect to another system, to ensure it's not having problems.

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dead sata bridge card. very common problem.
see all about it here:
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I'm hoping that someone will be able to point me to a simple solution to my problem...
I'm running iPhoto 9.6 on a MacBook Pro (Retina, 13 inch, mid-2014). The OS is Yosemite 10.10.1. Because the flash storage is only 250GB I have my main iPhoto library (146GB) on a partition of an external 1TB Lacie Rugged drive. The external hard drive also has partitions for Time Machine Backup and SuperDuper Bootable Clone. I have a separate, much smaller iPhoto library on the MBP which contains recent photos.
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I recall that it used to be possible to fix this sort of thing (perhaps not) by trashing the com.apple.iPhoto.plist file, however, I don't seem to be able to find it :-(
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Tricia

Further update ....
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2015-01-21 10:49:18.671 iPhoto Library Manager 4.1.11; iPhoto 9.6; OS X 10.10.1; unregistered
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http://support.apple.com/kb/PH14745
Show or hide the Libraries list
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To hide the Libraries list: Click the Hide button on the left side of the toolbar.
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To move items between events or libraries: Drag the clip or project to another event or library.
To copy items between events or libraries: Option-drag the clip or project to another event or library by first starting to drag and then holding down the Option key as you drag.
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My external hard drive will no longer connect to my macpro......any ideas on how to solve this problem??

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