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Error -644 (chunk file damaged)


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Hello everybody,

 

this morning last night's backup presented the following error message to me:

 

!Can't save Catalog File, error -644 ( chunk file damaged during access)

 

Googling for that particular error didn't give a result. I only found some references to an error #-645 which might be related or not.

However, these errors (-645( seem to refer to Retrospect for Windows whereas here, we have Retrospect Mac Version 11.5.3 (103)

running on Mac OS X Server 10.7.5.

 

What does the error mean an how do I salvage it?

 

Thanks in advance

 

Horst

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Where is the catalog file stored? The default location on the internal boot drive? Or on a USB drive? Or on a NAS server? The latter two locations can maybe explain why you got the error as those are not 100% reliable.

 

Anyway, you should "Rebuild" the catalog file to get i working again.

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I didn't do a rebuild, since the file, assuming it to be 

 

 /Libary/Application Support/Retrospect/Catalogs/OKT_DEZ_2015.rbc

 

is about 3.5 GB large and stores the catalag of 5 LTO-tapes. So I would expected a rebuild to run longer than

a single night and thus I have delayed it until weekend.

However last night's scheduled backup executed fine without an error, so perhaps the catalog file may

not be corrupted ? I don't know. 

What I'm going to do is to keep an eye on that issue and if the error reoccurs, do a rebuild of the catalog.

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If you have the option "Fast catalog rebuild" turned on (which is the default), the rebuild uses only the last tape and saves you from reading the first four tapes.

 

The error could hit you when trying to do a restore and time is at a premium. I think you should do a rebuild and not wait for another backup error to occur.

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