An apparatus for collecting dump data collection receives an on demand data (ODD) dump request, pauses one or more scan loops, transfers dump data to an ODD dump buffer space, unpauses the scan loops, and offloads dump data from the ODD dump buffer space to the storage device. The apparatus may also prioritize dump data for transfer to the ODD dump buffer space, load balance dump data for transfer to the ODD dump buffer space, and schedule offloading of the dump data from the ODD dump buffer space to non-volatile storage.