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"Change Disk..." in Time Machine stays grey

1001 Views 26 Replies Latest reply: Oct 15, 2012 9:42 AM by BDAqua RSS
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strawbale Calculating status...
Currently Being Moderated
Oct 12, 2012 3:04 AM

I've been using two (identical) external FW400 HDs for backing up two (identical) Macmini's that we have in the house, backing up both Macmini's onto both HDs satisfactorily for the last 3,5 years or so. Today backing up MacMini A and B onto HD#1 went fine, then I couldn't "Change Disk..." (to backup onto HD#2 on MM-A anymore (stayed 'grey', so not 'clickable'), but could still "Change Disk..." on MM-B.

So now I'm 'stuck' with using only HD#1 for MM-A as it still 'recognizes the last used backup drive, I suppose, because eventhough I cannot click "Change Disk..." anymore I can still backup onto HD#1 by rightclicking the TimeMachine ico and then clicking "Backup Now". On MM-2 I can still use both HDs.

 

Does anyone have a tip how to make "Change Disk..." work again on MM-A? (I did disconnect and unplug the ext HD, with its own power supply, and then restart MM-A and then reconnect the ext HD, but to no avail)

Mac mini, Mac OS X (10.5.8), mid-2007 model (2GB RAM, 120 GB HD)
  • BDAqua Level 10 Level 10 (114,805 points)
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    Oct 12, 2012 9:43 AM (in response to strawbale)

    Open console in Applications>Utilities, check the system log for the date/time of the last problem  & the Startup right after that for clues.

  • BDAqua Level 10 Level 10 (114,805 points)
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    Oct 12, 2012 10:28 AM (in response to strawbale)

    If we can get some current log that mentions backupd or such, that'd be good.

  • BDAqua Level 10 Level 10 (114,805 points)
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    Oct 12, 2012 10:52 AM (in response to strawbale)

    Hmmm, cookies!???

    And not mentioned by Apple:

    5- Copied the hidden .my-MAC-Address file from the existing backup drive onto the new one. (To make it match my MacBook’s /var/db/.TimeMachine.Cookie file, and hence make Time Machine on my MacBook oblivious of which backup volume is actually attached to the mini. So: no need to change the backup disk in the Time Machine preferences when swapping the drives.)

    http://rolfje.wordpress.com/2008/09/07/a-bigger-timemachine-without-changing-his tory/

  • BDAqua Level 10 Level 10 (114,805 points)
    Currently Being Moderated
    Oct 12, 2012 2:08 PM (in response to strawbale)

    Hmmm, I don't think reformatting yet, I was hoping maybe that one hidden .cookie file replacement might do it, you'll need to turn off TM first.

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