Time Machine see a disk that is no longer connected

I have a MyBook World NAS drive that I use for backups Time Machine.  The unit was called MyBookNAS.  I had trouble with Time Machine, so I deleted the Time Machine backups, deleted the Prefs file, renamed the MyBook-NAS device and change the address MAC of the NAS.

The problem I have is that time machine preferences show the old disk, and it cannot be removed from the Select Disk option.  I click "Select Disk" click on the old name of device, click "Remove disc", click on "Stop using this drive" and yet.  It also lists my last back up from July, even if I had a recent backup device 'new '.

It seems to me that the time machine has somewhere preferences that are corrupted.  When I "enter Time Machine" it can't find the backup of July (logical) but does not even backup 'new '.

Is there another file of parameters of Time Machine that can be removed?  I want to start with Time Machine.  I tried to remove the drive with Time Machine, before the restart, after restart, all combinations.

Operating system is Yosemite.

Thank you

-dan

You are aware that Apple strongly recommends against the use of NAS drives for Time Machine backups storage?

Tags: Mac

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