I didn't call it 6 EB in the title because people wouldn't recognize what that means. Anyway, it's estimated that it is about two weeks worth of the global supply of NAND that was destroyed, or half of what Toshiba and Western Digital will produce in a quarter. This is likely to result in higher SSD prices than there would be otherwise for a while, though nothing like the really high hard drive prices that happened some years ago due to flooding in Thailand. This affects only one of the four major NAND flash vendors.
Apparently a 13 minute power outage is all that it took to do that. If it shuts down a bunch of equipment in the process of various stages of producing chips, that could destroy all of the chips that were in process at the time.