Estimated capacity notes
Every time tape data is captured, IT Analytics recalculates the estimated tape capacity for the tape media type and volume pool combination. It takes into consideration the written KBs for the media type and volume pool for full tapes and then stores the average as the estimated tape capacity. Initially, when there is not enough data captured, this value may look low compared to the capacity stated by the vendor. Over time, the estimated capacity improves to the actual number of KBs that is being written to the tapes. Note that the amount of data that fits on the tapes differs based on the compression algorithm used and the type of data that is being backed up, which results in different compression ratios.