Clear ATA Security Lock (Encryption) on ex-Pure Storage array drives

purestorage-hdparm-secure-erase.sh

# Done successfully on a Toshiba THNSNJ512GCSY
# WARNING: ALL DATA ON THE DRIVE WILL BE LOST; DON'T DO THIS UNLESS YOU KNOW ITS WHAT YOU NEED
# This is a series of shell commands, not a functional script
# Once unlocked, the drive should be able to be initialized/MBR written and partitions created.

sudo -s

# Identify drives
lsblk

#NAME    MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
#sda       8:0    0 476.9G  0 disk 

hdparm -I /dev/sda
# Look for Security section, often near the bottom
#
#Security: 
#	Master password revision code = 65534
#		supported
#		enabled
#		locked
#	not	frozen
#	not	expired: security count
#		supported: enhanced erase
#	Security level maximum
#	2min for SECURITY ERASE UNIT. 2min for ENHANCED SECURITY ERASE UNIT.

# https://www.reddit.com/r/purestorage/comments/14bks8j/comment/jsggp6t/

hdparm --user-master m --security-erase PUR3_DrIvE_RETSAM_K3Y /dev/sda

#security_password: "PUR3_DrIvE_RETSAM_K3Y"
#
#/dev/sdb:
# Issuing SECURITY_ERASE command, password="PUR3_DrIvE_RETSAM_K3Y", user=master

# No I/O error, password accepted

hdparm -I /dev/sda

#Security: 
#	Master password revision code = 65534
#		supported
#	not	enabled
#	not	locked
#	not	frozen
#	not	expired: security count
#		supported: enhanced erase
#	2min for SECURITY ERASE UNIT. 2min for ENHANCED SECURITY ERASE UNIT.