SSD/NVME usually have secure wipe functions in the controller for this not to destroy the flash with shred or like.  From my notes:

## if SSD

## if you need to wipe the disks, use a security erase on them
## you will sometimes need to unfreeze drives, a suspend and awaken works

sudo hdparm -I /dev/sda | grep froz
sudo hdparm -I /dev/sdb | grep froz

## make sure these are the right disks, they will be wiped.

hdparm --user-master u --security-set-pass PasSWorD /dev/sda
hdparm --user-master u --security-erase PasSWorD /dev/sda

hdparm --user-master u --security-set-pass PasSWorD /dev/sdb
hdparm --user-master u --security-erase PasSWorD /dev/sdb

## if NVME/M.2

## confirm nvme-cli is available

which nvme

## confirm secure erase mode, should be 0x1

nvme id-ctrl -H /dev/$nvme-disk0$ | egrep 'Crypto Erase'
nvme id-ctrl -H /dev/$nvme-disk1$ | egrep 'Crypto Erase'

nvme format -s1f /dev/$nvme-disk0$
nvme format -s1f /dev/$nvme-disk1$

-mb

On Mon, Aug 29, 2022 at 3:05 PM Retro64XYZ via PLUG-discuss <plug-discuss@lists.phxlinux.org> wrote:

Don't do that to an SSD.

On 8/29/22 14:47, Michael via PLUG-discuss wrote:

To delete everything would I type

sudo shred /dev/sda 

From a live disk?

--

:-)~MIKE~(-:

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