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gkowalsky6

Tape capacity misreported?

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After adding new tape to the set, I noticed that on quit Retrospect reported a whopping 312.5 GB of total capacity of this tape - regular DLT IV tape. What can be wrong with this, and which dangers are lurking around? I did try to search the KB and forums, but did not find an answer yet.

 

My configuration: Multiserver 6.0.206 (Driver Upd. 3.9.106) - I believe these are the latest versions, running on patched W2K, backing up to ATL PowerStor L200 8-slits 1-drive library (latest firmware, I believe, too). Both the drive and the library are disabled in Windows Device Manager, in Retrospect I'm using NT SCSI Passthrough - I recently had a painful affair with ASPI.

 

I am running short rerstore tests weekly, so long the files were restored without any problems from the tape in question. I am reluctant to play with preferences' files - I recently had these corrupted and had to recreate them manually.

 

Your suggestions would be greatly appreciated.

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Hi

 

Retrospect quesses the capacity of tapes before they are used. It is purely a quess and has no bearing on how much data gets written to the tape. In other words - ignore the message, its meaningless.

 

If you look at the properties of the backup set how much data is actually stored on each member tape?

 

Thanks

nate

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Thanks for your reply, I'm relaxad now. I recently went through some rather ugly situation with damaged carridge, and misreporting message appeared immediately after introducing a new cartridge to the set.

 

What can cause this error? Can it be a sign that something's wrong (or will be) with the set, or with the drive?

 

Paranoia...

 

Thanks again!

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Hi

 

Its not an error really. Retrospect makes a guess of how much data could possibly fit on your tape. There is no way to tell how much will actually fit on there ahead of time so a guess has to suffice.

 

It truly is meaningless. Retrospect will write until the tape is physically full or a media failure occurs.

Nate

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