I'm writing to tape using a Quantum SuperLoader3 which holds 8 tapes. Last week I ejected 2 tapes that were marked as offsite ready and replaced them with blank ones. Over the weekend the blank ones were used but I also got a lot (89 to be precise) of
DPM alerts saying, 'Job requires tape that is not available in the library'. However, looking at the Tape Management Report the due dates for these tapes aren't until the 3rd and 4th week of July. The rest are still in the loader and usable by DPM.
Why is it trying to write to tapes marked as offsite ready?
Looking at tape usage again I think I may have found the reason for this. The TapeExpiryTolerance defaults to 17% of the retention range. So for a 3 month range that's 13.69 days. Does this mean that DPM will write to tape,mark it as offsite ready, then
be able to append to it for 2 weeks after? What effect does the TapeWritePeriodRatio have?
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