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Can I switch off extended attributes warning error when backup to network?

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Max

02 Aug, 2012 07:51 AM

I need to schedule a daily backup of my documents to a company network share.
All works fine, but every day I need to confirm that some files (Microsoft User Data/Entourage Script Menu Items/...) have had an extended attributes problem.
I don't want to see alway this error, i want to see only REAL problem, if it's.

Can you help me?

Many thanks.
Max

1. Support Staff 2 Posted by Mike Bombich on 02 Aug, 2012 03:41 PM

   

   Hi Max:

   I'd like to take a look at the errors. CCC already suppresses errors that aren't important or indicative of a problem. If you're seeing errors, that probably means there is a real issue with the backup. Can you submit your logs to me for review? The easiest way to do this is from within CCC:

   1. Choose "Report a problem" from the Help menu
   2. Click on the "Submit Logs" tab and review the information presented
   3. Click on the "Submit Logs" button
   4. Update this discussion to let us know that you've submitted your logs, and please note the submission ID at the bottom of the Submit Logs tab.

   Thanks,
   Mike

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2. 3 Posted by Orlandini, Max on 02 Aug, 2012 04:27 PM

   

   On attachment my last log.
   I don't care a backup that will restore the machine completely, I just want to save my user's folder data so I think that the errors identified are minor. Am I wrong?

   Please do not publish the information in the log, if it is not really necessary.

   Thanks.
   Max

   -----Messaggio originale-----
   Da: Mike Bombich [***@***]
   Inviato: giovedì 2 agosto 2012 17:41
   A: Orlandini, Max
   Oggetto: CCC Support: Can I switch off extended attributes warning error when backup to network?

   **** PLEASE REPLY ABOVE THIS LINE ****

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3. Support Staff 4 Posted by Mike Bombich on 02 Aug, 2012 04:58 PM

   

   Hi Max:

   Extended attributes are often "disposable" data, but if the extended attribute happens to be a resource fork, there's a good chance that it has important data.

   I didn't get your log, can you try attaching that again? I made this discussion private, so now only you and I can see anything posted here.

   Thanks,
   Mike

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4. 5 Posted by Orlandini, Max on 03 Aug, 2012 07:11 AM

   

   I'm sorry Mike, the mail was start without attachment...
   Now I think it's better!

   Many thanks again for your always fast response.

   Max

   -----Messaggio originale-----
   Da: Mike Bombich [***@***]
   Inviato: giovedì 2 agosto 2012 18:58
   A: Orlandini, Max
   Oggetto: CCC Support: Can I switch off extended attributes warning error when backup to network?

   **** PLEASE REPLY ABOVE THIS LINE ****

   • CCC.log 4.3 KB

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5. Support Staff 6 Posted by Mike Bombich on 03 Aug, 2012 06:55 PM

   

   Hi Max:

   Those are resource forks that are getting lost, so in general, I deem them as being important enough to complain about, and there's no way to suppress the messages short of solving the problem that leads to them.

   I've seen this pattern of errors before -- the remote filesystem is complaining when CCC tries to write extended attributes larger than 4KB. 4KB is the typical limit for most filesystems, though there is generally an exception for resource forks, because there is no limit for resource forks on HFS+. That doesn't mean every filesystem allows it, though, sometimes they just outright refuse to write them. I have even seen some filesystems that refuse to write Apple-specific extended attributes altogether (e.g. any attribute preceded with "com.apple").

   There's also a chance that there is a bit of filesystem corruption on the destination that is leading to these errors, so the first thing I would suggest would be to delete those files from the destination volume, then try the backup task again. If the errors recur, I would conclude that the remote filesystem simply isn't going to support large extended attributes, resource forks, etc. If those four items are the only items affected, you could exclude them from the backup task, delete them (e.g. if you don't need them), or you could back up to a different destination (e.g. to a disk image on the network share).

   Mike

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6. Mike Bombich closed this discussion on 20 Sep, 2012 05:01 AM.

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