Comment # 7 on bug 1222429 from Jiri Slaby

(In reply to Wenruo Qu from comment #5)
> Furthermore, most rescue= options would require ro mount option, and can not
> be remounted to RW, this is by design.

Note that exactly happens:
        mount_options = ["ro"]
        mount_options << "norecovery" if NORECOVERY_FS.include?(freshman[:fs])