[Bug 203791] gpart cannot show/list gpt partitions inside a gpt partition
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bugzilla-noreply at freebsd.org
Thu Oct 15 15:01:42 UTC 2015
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=203791
Bug ID: 203791
Summary: gpart cannot show/list gpt partitions inside a gpt
partition
Product: Base System
Version: 10.2-STABLE
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: bin
Assignee: freebsd-bugs at FreeBSD.org
Reporter: la5lbtyi at aon.at
On a GPT-partitioned disk in my server (ada3) I have three partitions (ada3s11,
ada3s12, and ada3s13) for use in conducting experiments using VirtualBox. In
the VirtualBox client, these partitions show up as disks which can then be used
for various purposes.
In one test these partitions show up as ada0, ada1, and ada2 in the VB client,
respectively.
In the VB client, ada1 and ada2 have been MBR-partitioned, whereas ada0 has
been GPT-partitioned as follows.
(in the VB client; everything not containing "ada[012]" has been replaced by an
ellipsis)
# gpart show
=> 34 41942973 ada0 GPT (20G)
34 6 - free - (3.0K)
40 1024 1 freebsd-boot (512K)
1064 984 - free - (492K)
2048 4194304 2 freebsd-zfs (2.0G)
4196352 4194304 3 freebsd-swap (2.0G)
8390656 33550336 4 freebsd-zfs (16G)
41940992 2015 - free - (1.0M)
=> 63 41942977 ada1 MBR (20G)
63 4194241 1 fat32 (2.0G)
4194304 37748736 4 freebsd [active] (18G)
...
=> 0 37748736 ada1s4 BSD (18G)
0 4194304 1 freebsd-zfs (2.0G)
4194304 4194304 2 freebsd-swap (2.0G)
8388608 29360128 4 freebsd-zfs (14G)
...
=> 63 41942977 ada2 MBR (20G)
63 4194241 1 fat32 (2.0G)
4194304 37748736 4 freebsd [active] (18G)
...
=> 0 37748736 ada2s4 BSD (18G)
0 4194304 1 freebsd-zfs (2.0G)
4194304 4194304 2 freebsd-swap (2.0G)
8388608 29360128 4 freebsd-zfs (14G)
...
[0]#
(on the server, outside the VB client; the VB client has been shutdown to allow
access to the partitions; everything not containing "ada3" has been replaced by
an ellipsis)
# gpart show
...
=> 34 3907029101 ada3 GPT (1.8T)
34 30 - free - (15K)
64 192 1 freebsd-boot (96K)
256 41943040 11 freebsd (20G)
41943296 41943040 12 freebsd (20G)
83886336 41943040 13 freebsd (20G)
125829376 23068672 - free - (11G)
148898048 2684354560 3 freebsd-zfs (1.3T)
2833252608 536870912 4 freebsd-zfs (256G)
3370123520 536870912 5 freebsd-zfs (256G)
3906994432 34703 - free - (17M)
...
=> 63 41942977 ada3s11 MBR (20G)
63 41942977 - free - (20G)
...
=> 63 41942977 ada3s12 MBR (20G)
63 4194241 1 fat32 (2.0G)
4194304 37748736 4 freebsd [active] (18G)
=> 0 37748736 ada3s12s4 BSD (18G)
0 4194304 1 freebsd-zfs (2.0G)
4194304 4194304 2 freebsd-swap (2.0G)
8388608 29360128 4 freebsd-zfs (14G)
...
=> 63 41942977 ada3s13 MBR (20G)
63 4194241 1 fat32 (2.0G)
4194304 37748736 4 freebsd [active] (18G)
=> 0 37748736 ada3s13s4 BSD (18G)
0 4194304 1 freebsd-zfs (2.0G)
4194304 4194304 2 freebsd-swap (2.0G)
8388608 29360128 4 freebsd-zfs (14G)
...
#
The problem is that for ada3s11, gpart (executed on the server, VB not running)
does not show the correct partitioning scheme (which is GPT), but only the
compatibility MBR scheme. For ada3s12 and ada3s13, which are MBR schemes
anyway, the output is the same (aside from naming differences) inside and
outside VB.
The suggested solution is that gpart should first probe for a GPT scheme and
only afterwards for an MBR scheme when probing for further partitioning schemes
inside partitions.
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