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тАО05-14-2002 04:39 AM
тАО05-14-2002 04:39 AM
Thanks,
Michael
Solved! Go to Solution.
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тАО05-14-2002 04:47 AM
тАО05-14-2002 04:47 AM
SolutionWhat do you exactly mean by this question ?
How long data remain on the tape if once written ? At least 10 years.
How many times you can overwrite it ?
200 to 300 times, but after that the tapes will definetely wear out.
As far as i know OmniBack sets a usage of 200 times before alarm ' tape bad ' goes red.
Rgds
Alexander M. Ermes
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тАО05-14-2002 08:05 AM
тАО05-14-2002 08:05 AM
Re: DLT 40 Tapes
http://www.quantum.com/Service+and+Support/DLTtape+Drives+and+Media/Manuals/Default.htm
If you look at this document you will notice that there is a tape rating in number of head passes. Beware that this is not the same as number of loads. The format on the tape wraps back and forth in a serpentine layout, so if you wrote the entire tape the media would have passed over the head many times. Plus, calibration runs the tape over the head several times on each load.
Tape life has a lot to do with the conditions that the tape is subjected to. If you perform several small backups the tape and drive tend to get dirty faster. If the drive is "scrubbing" due to slow host performance or read / write problems the tape life will also be shortened. Humidity and temperature also effect tape life and performance.
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тАО05-23-2002 05:44 AM
тАО05-23-2002 05:44 AM
Re: DLT 40 Tapes
Had you try it ?
I garanty to you after 10 years of a DLT stored you can't restore the data from it. You must read the tape several times in the 10 years period.
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тАО05-24-2002 04:44 AM
тАО05-24-2002 04:44 AM
Re: DLT 40 Tapes
First of all, a DLT40 drive supports 3 types of tape cartidges:
DLTtapeIII, DLTtapeIIIxt, DLTtape IV.
The III is Gray, the IIIxt is white and the IV is black (the modern one).
All of these tape cartidges can handle up to 500,000 media passes, which is a cycle from beginning to the end of the tape.
Media shelf life is 20 years for the IV and 30 years for the other two cartidges.
Cleaning tape (Off white in colour) handles 20 media passes and has a 30 year shelf life.
HTH,
Vince