Hello,
You can use hponcfg on the OS to format de Flash using the below script":
<!-- RIBCL Sample Script for HP Lights-Out Products -->
<!--Copyright (c) 2016 Hewlett-Packard Enterprise Development Company,L.P. -->
<!-- Description: This is a sample XML script to force format ll -->
<!-- the iLO partitions. -->
<!-- iLO resets automatically for this operation to take effect -->
<!-- Warning: This command erases all data on the partition(s) -->
<!-- External providers will need to be re-configured if -->
<!-- partition is formatted -->
<!-- Input: VALUE tag: all - format all available partitions -->
<!-- NOTE:You will need to replace the USER_LOGIN and PASSWORD values -->
<!-- with values that are appropriate for your environment -->
<!-- See "HP Integrated Lights-Out Management Processor Scripting -->
<!-- and Command Line Resource Guide" for more information on -->
<!-- scripting and the syntax of the RIBCL XML -->
<!-- Firmware support information for this script: -->
<!-- iLO 4 - Version 2.42 or later. -->
<!-- iLO 3 - None. -->
<!-- iLO 2 - None. -->
<RIBCL VERSION="2.0">
<LOGIN USER_LOGIN="Administrator" PASSWORD="">
<RIB_INFO MODE="write">
<FORCE_FORMAT VALUE="all" />
</RIB_INFO>
</LOGIN>
</RIBCL>
