Do you have Qubes installer anywhere? If so, boot it, choose you want to repair the system. You will be prompted for disk encryption password(s). It will try to autodetect where your broken installation lies and mount it under AFAIR /mnt/sysimage. Then, you can access it or (if you want) chroot to it.
With the rescue mode, you probably won't be able to connect to network, but USB should work. Regards, Vít Šesták 'v6ak' -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To post to this group, send email to qubes-users@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/454d8ada-9c4b-4bc9-8abc-415f5d2617ec%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.