Comment by GauntletWizard

> In a random, non-repeating sequence, at each of 576 separate evenly spread locations on any drive, ValiDrive reads the current contents of that region. It then fills that region with random “data noise” then reads back the region's contents to verify that the “data noise” was actually stored. ValiDrive then always rewrites the region's original data to restore whatever data may have been originally stored there.

Does this test actually spot modern fakes? My understanding was that they typically used simple modulo addressing such that any write was immediately readable, and even large continuous chunks operated perfectly fine, it just also "overwrote" that address every 4GB or whatever.