Disk wiping

From Notes to self
Revision as of 11:25, 20 September 2014 by Verbovet (talk | contribs)
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  • To wipe an HDD by writing zeros to it:

# dd if=/dev/zero of=/dev/sdX iflag=nocache oflag=direct bs=4M

The average speed is about 100 MB/s, so 1 TB takes about 3 hours.

To print transfer statistics (to stderr):

# killall -USR1 dd

  • To wipe a SSD by the ATA Security Erase command
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