[Bug 262580] fsck fails system startup if USB disk is not yet configured

From: <bugzilla-noreply_at_freebsd.org>
Date: Wed, 16 Mar 2022 00:41:57 UTC 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=262580

            Bug ID: 262580
           Summary: fsck fails system startup if USB disk is not yet
                    configured
           Product: Base System
           Version: 13.1-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: misc
          Assignee: bugs@FreeBSD.org
          Reporter: karels@freebsd.org

I have a USB disk listed in /etc/fstab on a Raspberry Pi 4 system; the USB disk
is not root.  When booting 13.1-BETA1, the system startup fails because fsck
cannot open the disk device; the disk then configures shortly thereafter.  I
discovered that this setup worked in 13.0-RELEASE because fsck failed to open
the disk, but then exited with status 3, causing /etc/rc.d/fsck to invoke
root_hold_wait() from /etc/rc.subr.  Once the USB bus and disk configured, fsck
was re-run successfully.  In 13.1-BETA1, fsck exits with a status of 8 after
failing to open the disk, aborting the startup.  I verified that the relevant
change was in fsck by copying fsck* from 13.0 onto the 13.1 system; that
combination works.

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