roundTo
off_t roundTo = 0;
roundTo = 65536 >> fVolume->BlockShift();
roundTo = (512 * 1024) >> fVolume->BlockShift();
roundTo = size >> (fVolume->BlockShift() + 4);
roundTo = 65536 >> fVolume->BlockShift();
roundTo = 4096 >> fVolume->BlockShift();
if (roundTo > 1) {
blocksRequested = ((blocksNeeded + roundTo) / roundTo) * roundTo;
SetValue(roundTo(parsedValue, Precision()));