Performance is slow on HA3969U

By default, HA3969U operates in Write Through Cache which acknowledges writes only after they’ve been written to disk.

For performance gain, HA3969U can utilize its memory cache to acknowledge writes once written into memory cache. This is only advisable when HA3969U is connnected to a UPS Power Source.

Simply select “Disable Continuously Available” found at Storage > Volume > Edit (button) and as shown here.