03:00.0 RAID bus controller: Broadcom / LSI MegaRAID SAS 2208 [Thunderbolt] (rev 05)
 

This is risky but if you have an extra RAID/SAS card to replace it then you can try this to get IT mode.

https://docs.broadcom.com/docs-and-downloads/host-bus-adapters/host-bus-adapters-common-files/sas_sata_6g_p14/9207_8e_Package_P14_IT_Firmware_BIOS_for_MSDOS_Windows.zip

https://docs.broadcom.com/docs/12350477

Get the sas2flash for Linux:

https://docs.broadcom.com/docs-and-downloads/host-bus-adapters/host-bus-adapters-common-files/sas_sata_6g_p20/Installer_P20_for_Linux.zip

unzip Installer_P20_for_Linux.zip
Archive:  Installer_P20_for_Linux.zip
  inflating: Installer_P20_for_Linux/README_Installer_P20_Linux.txt  
   creating: Installer_P20_for_Linux/sas2flash_linux_i686_x86-64_rel/
  inflating: Installer_P20_for_Linux/sas2flash_linux_i686_x86-64_rel/sas2flash  
   creating: Installer_P20_for_Linux/sas2flash_linux_ppc64_rel/
  inflating: Installer_P20_for_Linux/sas2flash_linux_ppc64_rel/sas2flash  
  inflating: Installer_P20_for_Linux/SAS2FLASH_Phase20.0-20.00.00.00.pdf  
  inflating: Installer_P20_for_Linux/SAS2Flash_ReferenceGuide.pdf  
 

chmod +x Installer_P20_for_Linux/sas2flash_linux_i686_x86-64_rel/sas2flash
 

Save Your Card Details:

 Installer_P20_for_Linux/sas2flash_linux_i686_x86-64_rel/sas2flash -list -c 0
LSI Corporation SAS2 Flash Utility
Version 20.00.00.00 (2014.09.18)
Copyright (c) 2008-2014 LSI Corporation. All rights reserved

    No LSI SAS adapters found! Limited Command Set Available!
    ERROR: Command Not allowed without an adapter!
    ERROR: Couldn't Create Command -list
    Exiting Program.
 

P14 sas2flash won't run on Ubuntu 20 or similar/newer:

sas2flash: sas2flash: cannot execute binary file

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