Administrator Guide

Imaging solutions

ThinLinux will be using Delay Update as the default image and add-on upgrade mechanism.

Topics:

• ThinLinux RAW image upgrade

• Merlin imaging

ThinLinux RAW image upgrade

ThinLinux image is a tar ball of raw image, kernel and initrd. The raw image contains one ext4 read-write partition. The kernel and initrd is

downloaded to existing system and used for image upgrade during next boot. ThinLinux can not be downgraded to SLETC11 SP3 using raw

image. To upgrade SLETC11 SP3 to ThinLinux, use DELAYED_UPDATE method.

To upgrade ThinLinux using raw image, the image les should be on ftp or http server. The Server URL and upgrading options can be

congured through INI and or admin GUI. The ThinLinux image supports Wyse 7020, Wyse 5020, Wyse 3030 LT, and Wyse 5060 platforms.

Raw image upgrade is done only through delayed update. Delayed update is a service started by network. It downloads the image and add-

ons in background. Once it is ready, you will be prompted to restart the device. After the system is restarted, it is switched to upgrading

mode, in which the hard drive is ashed with the new image. The device is restarted into new system after upgrading. The maximum size of

the available storage is increased.

To upgrade from SLETC11, DELAYED_UPDATE add-on should be a newer version. Upgrading SLETC follows the above steps but the

changes are not preserved when upgrading from SLETC SP3 to ThinLinux. Downgrading ThinLinux back to SLETC11 is not supported by

raw image.

Downgrading and force imaging

Image downgrading does not take place unless INI parameter ,Update.AllowDowngrade=yes is specied or enabled through GUI. The

imaging process does not take place if the checksum of image le is the same as that of base image, unless force imaging is enabled

through GUI. The setting of forcing is reset after imaging. The force imaging of the same version of image is not supported by INI because

it causes a non-stop imaging of the same image when INI exists.

Mixed environment

RAW imaging - Through DelayedUpdate.URL only. Please see ThinLinux INI guide. $PLATFORM macro has to be specied to

DelayedUpdate.URL and the raw image and addons need to be put under that directory.

Preserve changes

Preserving changes is enabled by default. It can be changed through INI, Update.Preserve, or through GUI

Imaging solutions 95