Indicates the number of days for which data can be written on to a tape as a ratio of the retention period of the first data set written to the tape. For example, if the retention period for the first data set written to a tape, where Tape Data Colocation is enabled, is 100 days, and you set the Write-Period ratio as 0.15, data will be written to the tape for 15 days from the day on which the data set was written to the tape. After this period, the tape will be marked as offsite ready. The value can range from 0 – 1. The OptimizeTapeUsage parameter should be set to True to set TapeWritePeriodRatio for a DPM server. |