There are two types of OTA updates.

Firmware Over-the-Air

If you're using AirVantage to update a target device's firmware using .cwe file (for packages like modem, Yocto, Legato or spkgz-yocto.cwe), you're using FOTA technology. All files needed for the target update can be combined into one .cwe file. During the update process, the target reboots; the boot code uses the .cwe file to update the target device. An update completed through FOTA is considered good, and there is no rollback.

Software Over-the-Air

If you're using AirVantage to update your target device's apps using Legato's Update Process, you're using SOTA technology. You can create single-app SOTA update files (mkapp followed by av-pack) or bundled SOTA update files (mksys mksys followed by av-pack). All files needed are included in the one .update pack file, and it provides built-in rollback recovery. The .update file is used by the Legato application framework, so the target doesn't need to reset to apply the update.

Copyright (C) Sierra Wireless Inc. Use of this work is subject to license.