Recovering the Witness host OS
About this task
For recovering the Witness host, follow the RASR process under Witness host deployment.
Topics:
• Witness host installation: RASR
• RASRISO to RASRUSB tool instructions
Witness host installation: RASR
About this task
The RASR tool developed by the FEAR (Factory Enablement And Recovery) team can reimage a Witness host operating system
along with any required drivers or packages. These packages include:
● Dell OS-Agent for Witness (DOSA-W)
○ Additional GPIO driver support packages
● Virtual Machine - VMware vSAN Witness Appliance
NOTE: The default password for the VMware vSAN Witness Appliance is @witness123!
For XR4000w Witness sled this tool is currently limited to ESXi.
For this process, two items are required:
● An ISO created specifically for the RASR process
● An additional tool RASRISO-to-RASRUSB to create the bootable RASRUSB key
RASRUSB key is required since the XR4000w Witness sled does not have an iDRAC that can utilize virtual media functionality.
NOTE: Follow the instructions for using the RASRISO-to-RASRUSB tool to create a bootable RASRUSB key.
To perform the RASR installation process, the Witness sled must be powered off and the created RASRUSB key inserted. A
serial connection to the Witness is required to interact with the RASR process. See Connecting to Witness via serial for details.
Upon powering the Witness back on, it should boot to the inserted USB. Once booted to the RASR drive, the only options
available are to perform a Factory Reset or Quit. Selecting the Factory Reset option will prompt the user for confirmation before
beginning. During the reset process, the system will reboot multiple times to facilitate the installation of the operating system
and its packages or dependencies.
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58 Recovering the Witness host OS
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