If the boot and root partitions are on different disks, the configuration is not supported by ASR. It most likely to result in this error "ASRMobilityServiceBootDiskNotFound" If this is not the reason, one of the below could be possibly blocking you from installing ASR agent.
Other configurations that aren't supported with ASR are
- /boot on LVM not supported
- These directories (if set up as separate partitions/file-systems) must be on the same OS disk on the source server: /(root), /boot, /usr, /usr/local, /var, /etc.
- Multiple OS disks aren't supported.
This is documented on ASR Support Matrix, for details see, https://learn.microsoft.com/en-us/azure/site-recovery/vmware-physical-azure-support-matrix#linux-file-systemsguest-storage
Let me know if you need any further help!
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