STMIX - DISK FULL - no access

[jarmac]

Hello

I have a problem with the STMIX card

The system H4K V8.0 STMIX card worked for about 1 year and STMIX card stopped working.
probably error in LW update

Symptoms in STMIX card
Disk full.

I cannot connect via USB because I cannot change the root password - the disk is full.

Do you know any method of restoring the STMIX card to standard?

regards
jarmac

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EDIT1 - work in progress
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I can access to card via single user mode in Suse Linux
by add init=/bin/bash to boot sequence.

but delete file do not help.

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EDIT2
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Does anyone have pxe boot file to restore STMIX, like is show in attachement file
STMIX_JeOS_SLES11_SP4.x86_64-V7_R2.40.14.tar.gz
STMIX_JeOS_SLES11_SP4.x86_64-V7_R2.40.14.tar.gz.pxeboot