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  #1  
Old 04-01-2019, 01:45 AM
rwross rwross is offline
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Daughter's Backup Failed :-(

Hi Dave,

My daughter's Mac blew an error during this week's backup and I just now noticed. I tried to run it again, but the same error occurred. I copied the last few lines from the log in hopes you might have some idea what's up.


| 01:21:57 AM | Info | Re-copying: /private/var/db/diagnostics/Persist/00000000000004df.tracev3
| 01:22:12 AM | Info | Unable to read source file /private/var/db/diagnostics/Persist/00000000000004df.tracev3 due to error: 5, Input/output error
| 01:22:12 AM | Info | Error copying /private/var/db/diagnostics/Persist/00000000000004df.tracev3 to /Volumes/Tumnal Clone/private/var/db/diagnostics/Persist/00000000000004df.tracev3 of type 8 due to error 5
| 01:22:12 AM | Error | SDCopy: Error copying /private/var/db/diagnostics/Persist/00000000000004df.tracev3 to /Volumes/Tumnal Clone/private/var/db/diagnostics/Persist/00000000000004df.tracev3 of type 8 due to error 5
| 01:22:13 AM | Error | : Input/output error
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  #2  
Old 04-01-2019, 07:29 AM
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dnanian dnanian is offline
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Yes, as the log indicates, it's a read error on the source. It looks like a failing drive.

Use Finder's Go To Folder command to open

/private/var/db/diagnostics/Persist

Once there, delete 00000000000004df.tracev3, empty your trash and try the copy again.
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Old 04-02-2019, 07:20 PM
rwross rwross is offline
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Thanks for the quick response, Dave. That's what I was afraid of. SMART status showed all was well, but SD! is usually a better, if unwanted, canary in the coal mine.

Going forward is that how I should interpret that line of the log. It seemed somewhat generic in that I assumed there might be multiple reasons for an "Input/Output" error.

I'm trying to delete the offending file now and see what happens.
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Old 04-02-2019, 09:15 PM
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dnanian dnanian is offline
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In the future, send the log with the "Send to shirt pocket" button and I can do some additional analysis that way...
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Old 04-05-2019, 01:42 AM
rwross rwross is offline
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Will do...

And I deleted the file as you suggested which did allow the backup to complete, so thanks for that!

I suspect her iMac is headed for a full disk failure at some point. It's pretty darn old so not sure if a repair makes sense :-(
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