Follow-up Comment #1, bug #29956 (project grub):
Attached is an image that demonstrates the problem.
(MBR) Partition table:
0: NetBSD (sysid 169)
start 32, size 1000 (0 MB, Cyls 0-0/32/8)
PBR is not bootable: All bytes are identical (0x00)
1: Primary DOS with 16 bit FAT <32M (sysid 4)
start 1040, size 1000 (0 MB, Cyls 0/32/17-0/63/24)
(NetBSD disk label) 5 partitions:
# size offset fstype
a: 1000 32 4.2BSD
c: 1000 32 unused
d: 2048 0 unused
e: 1000 1040 MSDOS
niagara# grub2-probe --target=fs --device-map=/dev/null -d /dev/rvnd0e
grub2-probe: error: unknown filesystem.
The problem likely comes from the fact that e: is not contained in the NetBSD
MBR partition (or, at least, the sectors that are read to determine its fs
type).
If the MBR partition table is changed as follows:
0: NetBSD (sysid 169)
start 32, size 1200 (1 MB, Cyls 0-0/47/28)
PBR is not bootable: All bytes are identical (0x00)
1: <UNUSED>
Then the problem disappears.
(file #20612)
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Additional Item Attachment:
File name: bsdlabel-fs-bug.img.gz Size:4 KB
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