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"The selected SAN location is already in use"

After upgrading to FCPX 10.0.1 I get the message: "The selected SAN location is already in use" and FCPX can't see my Firewire-attached DroboS.

The fine-print in that message tells me that the same user that I am currently logged in on (from the same computer) is already using that drive. I therefore cannot use that drive for FCPX at all.


The Drobo is accessible through Finder, and when FCPX is starting up it does briefly appear in the list of drives that contain FCPX events. I have tried deleting the files .fcplock and .fcpuser that appear in the root folder for the Drobo, but this makes no difference.


HELP!! I need to be able to use my external storage!

Final Cut Pro X, Mac OS X (10.6.8), MacPro4,1

Posted on Sep 30, 2011 8:08 AM

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23 replies

Jun 11, 2012 4:29 PM in response to raw-mob

I'm editing FCPX on an Imac 3.4 Ghz i7, 16 gb RAM, OS 10.7.3, using a 4TB RAID 1 Western Digital Thunderbolt drive partioned into a two 2GB mirrors. On three occasions in the past month FCPX has frozen, and then I've gotten the "Selected SAN location is already in use" error. Then the Western Digital drive utilities tell me the RAID status is degraded, and that one of the two mirrored drives cannot be accessed.

Each time I've been able to keep editing from the remaining RAID partion, and then restore from the RAID mirror, but I'd like to ask if anyone has found a way to keep this freeze up and shut down from happening.

Aug 27, 2012 8:17 PM in response to raw-mob

After reading about Apple's warning that mounted DMG files could potentially be the issue I checked to see if I had any mounted. I didn't - but i did have an external USB hard drive that i wasn't using for my work at the time attached. I ejected it and it seems to have been the culprit. Now, everything seems to be working perfectly well 🙂 Can anyone else confirm this in their experience?

"The selected SAN location is already in use"

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