Time machine stopped working after update

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Hi, I am not new to time machine but I am not familiar with all the nuances with the particulars of what I am doing. I have an emac running leopard as a server with an external drive designated for time machine on my macbook. I created my sparsebundle and have had time machine running on my emac designated for my macbook for a couple of months with no real issues. A few days ago I updated my emac, and now my macbook's time machine (which is running Lion) now no longer sees my sparsebundle. I remounted the drive on my macbook via "connect to server" in finder afp://(ip). I assigned the drive in time machine to this location and now I am getting:

the backup disk image macbook.sparsebundle could not be accessed error 22

I have not backed up in almost a week because I recently purchased a macbook pro and I have been busy with migration assistant and such, I have changed a few things on my macbook that may have affected time machine but I suspect the cause is my recently updated emac with leopard.

please help I have exhausted google and the best I have come up with is maybe I should "reset spotlight" on both machines, which also seems like it might be somewhat risky. Thanks in advance
 
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Sparsebundle cannot be accessed error-1

My computer suddenly could not connect to my Time Machine. I could see a Time Machine disk image mounted but it was white, not the usual green Time Machine image with an arrow going anti clockwise. I tried going to LIBRARY, then PREFERENCES and deleting the apple.timemachine.plist but it did not help.

My Time Machine was connected to a Western Digital hard disk as an additional backup. This was affecting the Time Machine - not sure why as it was working normally before (even after the LION OS upgrade).

The way to fix it for me was to disconnect the Western Digital disk. Then turn Time Machine to "Off" (not the physical machine itself but via the System Preferences). Then go to Mackintosh HD then open LIBRARY and then LAUNCHDAEMONS. Look for any .plists related to Western Digital (usually has "WD" in the file name). I found 2 files and put them in the trash. Turned Time Machine on and it started to backup normally again.

If you find that each time the hourly backups involve a huge backup this may be due to the fact that you are including in your backup ENTOURAGE (which is considered one huge file so that even a single email would involve backing up the entire database for ENTOURAGE.) The way to solve this problem is to back up your MICROSOFT USER DATABASE separately. You can find this in USER then DOCUMENTS then MICROSOFT DATA BASE. I simply excluded the entire DOCUMENTS folder and back this up weekly in a separate disk. Alternatively migrate your emails to MAIL. So long as ENTOURAGE is not open no mails will be downloaded there.

Hope this helps. Cheers.
 

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