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  2. PCTECH
  3. April 2014

Re: LTO4 drive with possible issues

On 4/9/2014 12:36 PM, Jeff Crosby wrote:
Another thing I forgot to ask on LTO tapes:

4) Doing a little reading on LTO tapes and I found on Wikipedia (which is
never wrong <g>) "LTO uses an automatic verify-after-write technology to
immediately check the data as it is being written, but some backup systems
explicitly perform a completely separate tape reading operation to verify
the tape was written correctly. This separate verify operation doubles the
number of end-to-end passes for each scheduled backup, and reduces the tape
life by half." We do verifies via the backup software. Should I forget
that?

Yes, from what I learned a number of years ago, if the tape drive utilizes a helical scan head then the verify will likely be an automatic operation.

Bill


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