On the SETTINGS tab of ARIA Player, look at the RAM TOTAL and DYN MAX values.

If RAM TOTAL reaches DYN MAX while loading instruments, disk loss may happen.
If RAM TOTAL reaches DYN MAX while playing notes, no problem, disk loss should not happen.

To avoid disk loss due to big instruments samples load, increase DYN MAX and or decrease Pre Caching.

ARIA Player has a default DYN MAX value of 256, in case of disk loss or audio drop outs, increasing this value to 512 should improve the results.