Dell S4148T-ON
Start the console session.
Plug in serial cable to console port of device from PC COM1 port
Open PuTTY and select "Serial" connection type, change baud rate (Speed) to 115200 and leave other settings as default.
Plug power into device and if a power button exists, turn it on.
Access ONIE Menu
In the first GRUB menu use the up/down arrow keys to select "ONIE" and press Enter:
GNU GRUB version 2.02-cl3u2 +----------------------------------------------------------------------------+ | Cumulus Linux GNU/Linux | | Advanced options for Cumulus Linux GNU/Linux | | System setup | | Load a read-only snapshot | |*ONIE | | | | | | | | | | | | | | | +----------------------------------------------------------------------------+ Use the ^ and v keys to select which entry is highlighted. Press enter to boot the selected OS, `e' to edit the commands before booting or `c' for a command-line. Loading ONIE ...
Erase configuration.
In the second GRUB menu select "ONIE: Uninstall OS" and press Enter:
GNU GRUB version 2.02~beta2+e4a1fe391 +----------------------------------------------------------------------------+ | ONIE: Install OS | | ONIE: Rescue | |*ONIE: Uninstall OS | | ONIE: Update ONIE | | ONIE: Embed ONIE | | EDA-DIAG | | | | | | | | | | | | | +----------------------------------------------------------------------------+ Use the ^ and v keys to select which entry is highlighted. Press enter to boot the selected OS, `e' to edit the commands before booting or `c' for a command-line. ONIE: OS Uninstall Mode ... Version : 3.33.1.1-5 Build Date: 2017-06-28T10:29-0700
Further output will show the erasure progress before rebooting.
discover: Uninstall mode detected. Running uninstaller. Erasing internal mass storage device: /dev/sda4 (128MB) Percent complete: 93%random: nonblocking pool is initialized Percent complete: 100% Erase complete. Deleting partition 4 from /dev/sda Erasing internal mass storage device: /dev/sda5 (13735MB) Percent complete: 100% Erase complete. Deleting partition 5 from /dev/sda Uninstall complete. Rebooting... discover: Uninstall mode detected. No discover stopped. Stopping: dropbear ssh daemon... done. Stopping: telnetd... done. Stopping: syslogd... done. Info: Unmounting kernel filesystems umount: can't umount /: Invalid argument The system is going down NOW! Sent SIGTERM to all processes Sent SIGKILL to all processes Requesting system reboot sd 4:0:0:0: [sda] Synchronizing SCSI cache reboot: Restarting system reboot: machine restart
Copy all the output from the session into your records.
Right-click PuTTY's titlebar, from that dropdown menu click on "Copy All to Clipboard"
Open the file of record certifying the deconfiguration of this device and use CTRL V to paste all the output from PuTTY into that file. Formatting the text with a fixed-width font helps it look more readable.
End the session.
Close PuTTy.