Disk wiping: Difference between revisions
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* To wipe a SSD by the ATA Security Erase command: | * To wipe a SSD by the ATA Security Erase command: | ||
#Make sure the drive is not frozen: | #Make sure the drive is not frozen and support "enhanced erase": | ||
<code># hdparm -I /dev/sdX | <code># hdparm -I /dev/sdX | ||
:[...] | :[...] | ||
| Line 22: | Line 22: | ||
:: not expired: security count | :: not expired: security count | ||
::: <span style="background:#ffff00">supported: enhanced erase</span> | ::: <span style="background:#ffff00">supported: enhanced erase</span> | ||
:: 3<span style="background:#ffff00">min for SECURITY ERASE UNIT</span>. | :: 3<span style="background:#ffff00">min for SECURITY ERASE UNIT</span>. 3min for ENHANCED SECURITY ERASE UNIT. | ||
:[...] | :[...] | ||
Check that <code>hdparm</code> prints "XXXmin for SECURITY ERASE UNIT". | |||
[[Category: Debian GNU/Linux]] | [[Category: Debian GNU/Linux]] | ||
Revision as of 11:49, 20 September 2014
- 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:
- Make sure the drive is not frozen and support "enhanced erase":
# hdparm -I /dev/sdX
- [...]
- Security:
- Master password revision code = 65534
- supported
- not enabled
- not locked
- not frozen
- not expired: security count
- supported: enhanced erase
- 3min for SECURITY ERASE UNIT. 3min for ENHANCED SECURITY ERASE UNIT.
- [...]
Check that hdparm prints "XXXmin for SECURITY ERASE UNIT".