Based on my 33-year experience with IBM i, your expressed concern about degraded disk performance at high disk IO workload generated by saving large amount of data at once is valid for the case in which your IBM i server has only spinning disk and contains a small number of units .
You will worry (and use a user ASP for the virtual tape drive) only when you save a lot of data WHILE some important performance-sensitive application workload is also active during the data save period. Read More
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