Sintras feature a removable microSD card for easy drive swaps, reimaging, and upgrades.
Use this article to create a microSD with the latest disk image for Sintra machines.
NOTE: The latest disk image does not always contain the latest lamassu-machine release. Your machine may benefit from a subsequent remote update. The disk image here, however, will come with the most recent OS-level revisions ('rev' numbers). Compare the below listed lamassu-machine release with those at our Server & Machine Updates section to see whether it could use a subsequent update.
- microSD to USB adapter (shipped with the Sintra or obtained separately)
- microSD card 16 GB or higher (either the cryptomat's or a new one)*
- Computer (Linux, Mac, or Windows)
- Keys to the cryptomat
- Access to the server / admin while at the cryptomat
* Note: The actual sizes of drives vary by manufacturer. It's possible that some '16 GB' drives are too small for the image. We recommend drives by SanDisk. 32 GB drives will also work.
Download the disk image
The latest disk image for Sintras is Rev. 04 (2018-12-24), containing lamassu-machine v7.1.1.
You may download it here:
Do not unpack, unarchive, or mount the file on your computer after downloading.
Flash using Etcher
Disconnect all external drives and devices connected to your computer, except for the destination microSD drive.
Download and install Etcher (available for Linux, Mac, and Windows): https://etcher.io/
In Etcher, select the image file downloaded earlier, then select the destination microSD drive, and click flash.
Replacing the drive
At the Sintra, open the bottom cabinet with your key. Locate the battery pack which you originally connected after shipping. Carefully disconnect the white molex connector to remove backup power to the ssuboard.
Once disconnected, unplug the wall power cord to the Sintra to shutdown.
Locate the ssuboard enclosure and carefully press in on the existing microSD card in the slot underneath the red reset button, gently releasing to eject. It's small, so take care not to drop or lose it after ejecting.
Insert the new microSD card (labelled side facing to the right in the above photo) and push inwards until it clicks.
Booting the Sintra
Plug wall power back to the Sintra. Then, reconnect the battery power pack. Close the door.
The machine will boot to the first-run 'Congratulations' screen. Press the on-screen INIT button. Once on the 'Pairing' screen, use the '+ Add a Machine' panel in the admin to generate a new pairing code and pair with the machine.
IMPORTANT: Open the bottom cabinet now using your NFC key. The first NFC key that is presented to the machine is imprinted onto it as the authorised key. If you do not do this after booting from a new drive, anyone with an NFC key could authorise theirs to open the machine's cabinet.
Test transactions at the machine to ensure all performs as expected.