Reply to post: Actually

If you want a USB thumb drive wiped, try asking an arts student for help

DougS Silver badge

Actually

You should dd from /dev/full since NAND flash erases with 1s not 0s. Writing 0s adds an extra erase cycle for every block when compared with writing 1s. After writing 0s the drive is "full" from the FTL's point of view, so not only are you wearing it out faster subsequent writes will also be slower.

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