Set MDRAID boot_hint

src/idmslinux_installer/plugins/disk_usage/mdraid.py

@@ -87,15 +87,14 @@ class DiskUsageMDRAID(Plugin):
         if raid_level:
             ili_state.output_callback('Creating MDRAID arrays')
 
-            efi_disk = ili_state.install_disks[0]
             boot_disk = '/dev/md/0'
             root_disk = '/dev/md/1'
 
             mdadm = Mdadm()
 
             # Add all part3 to array
-            mdadm.create(boot_disk, 1, [get_partition(x, 3) for x in ili_state.install_disks],
-                         output_callback=ili_state.output_callback)
+            boot_attribs = mdadm.create(boot_disk, 1, [get_partition(x, 3) for x in ili_state.install_disks],
+                                        output_callback=ili_state.output_callback)
             # Add all part4 partitions to array
             mdadm.create(root_disk, raid_level, [get_partition(x, 4) for x in ili_state.install_disks],
                          output_callback=ili_state.output_callback)
@@ -111,5 +110,9 @@ class DiskUsageMDRAID(Plugin):
             for disk in ili_state.install_disks:
                 ili_state.add_boot_mbr(disk)
 
+            # Set the hint to use to find the boot fs
+            boot_uuid = boot_attribs['MD_UUID'].replace(':', '')
+            ili_state.boot_hint = f'mduuid/{boot_uuid}'
+
             # Add mdadm to the base packages
             ili_state.add_base_package('mdadm')