It is still not reproducible for me:
[2:42pm] 2515#dd if=/dev/zero of=disk seek=1024k count=1
1+0 records in
1+0 records out
512 bytes transferred in 0.002 secs (256000 bytes/sec)
[2:42pm] 2516#vnconfig -c vnd0 disk
[2:43pm] 2517#newfs -O 2 /dev/rvnd0a
/dev/rvnd0a: 512.0MB (1048576 sectors) block size 8192, fragment size 1024
using 12 cylinder groups of 42.67MB, 5462 blks, 10304 inodes.
super-block backups (for fsck_ffs -b #) at:
144, 87536, 174928, 262320, 349712, 437104, 524496, 611888, 699280, 786672,
...............................................................................
[2:43pm] 2518#mount /dev/vnd0a /mnt
[2:43pm] 2519#cp -r /bin /mnt
[2:43pm] 2520#umount /mnt
[2:43pm] 2521#dump 0f - /dev/rvnd0a | restore -rf -
DUMP: Date of this level 0 dump: Mon Jan 24 14:44:12 2022
DUMP: Date of last level 0 dump: the epoch
DUMP: Dumping /dev/rvnd0a (an unlisted file system) to standard output
DUMP: Label: none
DUMP: mapping (Pass I) [regular files]
DUMP: mapping (Pass II) [directories]
DUMP: estimated 2629 tape blocks.
DUMP: Volume 1 started at: Mon Jan 24 14:44:12 2022
DUMP: dumping (Pass III) [directories]
DUMP: dumping (Pass IV) [regular files]
DUMP: 2613 tape blocks
DUMP: Volume 1 completed at: Mon Jan 24 14:44:12 2022
DUMP: Date of this level 0 dump: Mon Jan 24 14:44:12 2022
DUMP: Date this dump completed: Mon Jan 24 14:44:12 2022
DUMP: Average transfer rate: 0 KB/s
DUMP: DUMP IS DONE
[2:44pm] 2522#modstat | grep boot
ffs vfs boot - 0 101897 ufs,wapbl
ufs misc boot a 1 84397 wapbl
wapbl vfs boot - 2 22572 -
[2:44pm] 2523#modstat | grep filesys
bpf driver filesys a 0 17596 bpf_filter
bpf_filter misc filesys a 1 2483 -
crypto driver filesys a 0 16313 opencrypto
exec_elf64 exec filesys a 0 5891 -
exec_script exec filesys a 0 1013 -
kernfs vfs filesys a 0 8545 -
opencrypto misc filesys a 1 17031 -
procfs vfs filesys a 0 26838 ptrace_common
ptrace_common exec filesys a 1 7043 -
ptyfs vfs filesys a 0 7390 -
tmpfs vfs filesys a 0 43518 -
vnd driver filesys a 0 12196 zlib
zlib misc filesys a 1 24965 -
[2:44pm] 2524#uname -a
NetBSD mb1.astron.com 9.99.93 NetBSD 9.99.93 (SPEEDY 2022-01-08 03:00:28 UTC) #2: Mon Jan 24 14:36:02 EST 2022 christos%mb1.astron.com@localhost:/usr/src/sys/arch/amd64/compile/SPEEDY amd64
[2:48pm] 2525#
> On Jan 23, 2022, at 12:50 PM, Paul Goyette <paul%whooppee.com@localhost> wrote:
>
> The following reply was made to PR bin/56643; it has been noted by GNATS.
>
> From: Paul Goyette <paul%whooppee.com@localhost>
> To: Christos Zoulas <christos%zoulas.com@localhost>
> Cc: gnats-bugs%netbsd.org@localhost
> Subject: Re: bin/56643: problem with restore(8)
> Date: Sun, 23 Jan 2022 09:45:06 -0800 (PST)
>
>> Attached!
>
> And here are a couple of local changes that make the "push ffs"
> stuff work. Please note that you also need to remove UFS_EXTATTR
> from the ufs and ffs Makefiles.
>
> ===================================================================
> RCS file: /cvsroot/src/sys/lib/libsa/ffsv1.c,v
> retrieving revision 1.8
> diff -u -p -r1.8 ffsv1.c
> --- sys/lib/libsa/ffsv1.c 27 May 2021 06:54:44 -0000 1.8
> +++ sys/lib/libsa/ffsv1.c 8 Jan 2022 21:10:18 -0000
> @@ -19,7 +19,7 @@
>
> #define FS_MAGIC FS_UFS1_MAGIC
>
> -#if 0
> +#if 1 /*XXX-PRG 0 */
> #define FSMOD "wapbl/ufs/ffs"
> #endif
>
> Index: sys/lib/libsa/ffsv2.c
> ===================================================================
> RCS file: /cvsroot/src/sys/lib/libsa/ffsv2.c,v
> retrieving revision 1.8
> diff -u -p -r1.8 ffsv2.c
> --- sys/lib/libsa/ffsv2.c 27 May 2021 06:54:44 -0000 1.8
> +++ sys/lib/libsa/ffsv2.c 8 Jan 2022 21:10:20 -0000
> @@ -19,7 +19,7 @@
>
> #define FS_MAGIC FS_UFS2_MAGIC
>
> -#if 0
> +#if 1 /*XXX-PRG 0 */
> #define FSMOD "wapbl/ufs/ffs"
> #endif
>
>
>
>
> +--------------------+--------------------------+----------------------+
> | Paul Goyette | PGP Key fingerprint: | E-mail addresses: |
> | (Retired) | FA29 0E3B 35AF E8AE 6651 | paul%whooppee.com@localhost |
> | Software Developer | 0786 F758 55DE 53BA 7731 | pgoyette%netbsd.org@localhost |
> | & Network Engineer | | pgoyette99%gmail.com@localhost |
> +--------------------+--------------------------+----------------------+
>
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