Appliance 5230 file system showing read only

Hi Friends,

I am facing an issue file system read only with appliance 5230 and cannot login on appliance via putty and getting below error.

Pleas help me.

Appliance.Support> Maintenance
<!-- Maintenance Mode --!>
Error in tempfile() using /tmp/errfile_XXXXXX: Could not create temp file
/tmp/errfile_qQQ3H4: Read-only file system at /opt/NBUAppliance/scripts/nbu_runcmd.pm line 266
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Regards,

Priyeranjan