You can try a "low-level" format of the flash chip and see what happen, with this:
http://hddguru.com/content/en/softwa...l-Format-Tool/
For me, recovered a faulty 1st-gen 512mb "bar" S1 player,
(the typical round one with BW lcd & multimegacolors backlight lol...)
pd. first time I hear of that chip's brand too :shock: