Disk wiping: Difference between revisions
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* To wipe an HDD by writing zeros to it: | * To wipe an HDD by writing zeros to it: | ||
<code># dd if=/dev/zero of=/dev/sdX iflag=nocache oflag=direct bs=4M</code> | :<code># dd if=/dev/zero of=/dev/sdX iflag=nocache oflag=direct bs=4M</code> | ||
The average speed is about 100 MB/s, so 1 TB takes about 3 hours. | :The average speed is about 100 MB/s, so 1 TB takes about 3 hours. | ||
To print transfer statistics (to stderr): | :To print transfer statistics (to stderr): | ||
:<code># killall -USR1 dd</code> | |||
* To wipe a SSD by the ATA Security Erase command: | |||
#Make sure the drive is not frozen: | |||
<code># 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. 442min for ENHANCED SECURITY ERASE UNIT. | |||
:[...] | |||
[[Category: Debian GNU/Linux]] | [[Category: Debian GNU/Linux]] | ||
Revision as of 11:36, 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:
# 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. 442min for ENHANCED SECURITY ERASE UNIT.
- [...]