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># ddrescue -f /dev/zero /dev/adaX</code>
:<code># dd if=/dev/zero of=/dev/sdX iflag=nocache oflag=direct bs=4M</code>
 
:The average speed is above 100 MB/s, so 1 TB takes about 2-3 hours.
:The average speed is above 100 MB/s, so 1 TB takes about 2-3 hours.
* To wipe an Intel/Solidigm Data Center SSD by the [https://www.solidigm.com/support-page/drivers-downloads/ka-00085.html Solidigm Storage Tool] (on Linux):
#Delete all partitions
#<code># sst delete --ssd <index></code>
::The <code><index></code> can be found by using the command
::<code># sst show --ssd</code>
* To wipe a SSD by the ATA Security Erase command:
#Delete all partitions and destroy the partitioning scheme
#:<code># gpart destroy -F adaX</code>
#Make sure the drive is '''not frozen''' and support '''"enhanced erase"'''
#:<code># camcontrol security adaX</code>


:To print transfer statistics (to stderr):
#Issue the ATA Secure Erase command
 
#:<code># camcontrol security adaX -U user -s Erase -h Erase</code>
:<code># killall -USR1 dd</code>
[[Category: FreeBSD]]
 
[[Category: Linux]]
* To wipe a SSD by the [https://ata.wiki.kernel.org/index.php/ATA_Secure_Erase ATA Security Erase] command:
[[Category: Hardware]]
 
#Make sure the drive is not frozen and support "enhanced erase":
:<code># hdparm -I /dev/sdX
:[...]
:Security:
::        Master password revision code = 65534
::                supported
::        not    enabled
::        not    locked
::        <span style="background:#ffff00">not    frozen</span>
::        not    expired: security count
:::                <span style="background:#ffff00">supported: enhanced erase</span>
::        3<span style="background:#ffff00">min for SECURITY ERASE UNIT</span>. 3min for ENHANCED SECURITY ERASE UNIT.
:[...]</code>
:Check that <code>hdparm</code> prints "XXXmin for SECURITY ERASE UNIT".
 
#Set a user password (this password will be cleared on the next step, so the exact choice does not matter):
:<code># hdparm --user-master u --security-set-pass foo /dev/sdX</code>
 
#Issue the ATA Secure Erase command:
:<code># hdparm hdparm --user-master u --security-erase foo /dev/sdX</code>
 
[[Category: Debian GNU/Linux]]

Latest revision as of 20:37, 15 May 2026

  • To wipe an HDD by writing zeros to it:
# ddrescue -f /dev/zero /dev/adaX
The average speed is above 100 MB/s, so 1 TB takes about 2-3 hours.
  1. Delete all partitions
  2. # sst delete --ssd <index>
The <index> can be found by using the command
# sst show --ssd
  • To wipe a SSD by the ATA Security Erase command:
  1. Delete all partitions and destroy the partitioning scheme
    # gpart destroy -F adaX
  2. Make sure the drive is not frozen and support "enhanced erase"
    # camcontrol security adaX
  1. Issue the ATA Secure Erase command
    # camcontrol security adaX -U user -s Erase -h Erase
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