I can confirm this issue. Hostname is none in initrd context. Thus mdadm fails when auto scan of md arrays. One workaround is to manually set HOMEHOST (to the hostname which was used while initially creating the array) and rebuild the initial ramdisk with mkinitramfs.
I can confirm this issue. Hostname is none in initrd context. Thus mdadm fails when auto scan of md arrays. One workaround is to manually set HOMEHOST (to the hostname which was used while initially creating the array) and rebuild the initial ramdisk with mkinitramfs.