Skip site navigation (1)Skip section navigation (2) 
Date:      Tue, 12 Jul 2016 09:32:25 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 211028] [GEOM][Hyper-V] gpart can't detect the new free space after the disk capacity changes
Message-ID:  <bug-211028-8@https.bugs.freebsd.org/bugzilla/>
next in thread | raw e-mail | index | archive | help 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D211028

            Bug ID: 211028
           Summary: [GEOM][Hyper-V] gpart can't detect the new free space
                    after the disk capacity changes
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: decui@microsoft.com

When testing Hyper-V's Online VHDX Resize feature (refer to Bug 211000), I
noticed an issue: after resizing =E2=80=9Cda1=E2=80=9D, if there was a disk=
 read before
"camcontrol reprobe da1", gpart couldn't detect the new =E2=80=9Cfree space=
", though it
could detect the new disk capacity.

To reproduce the bug, we need to run FreeBSD 12-CURRENT guest on Hyper-V (we
need to make sure the 2 patches mentioned by
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D211000#c4 are used to a=
void
the known issues) and do the following

1. This is before the disk capacity change:
[root@decui-b11 ~]# gpart show  da1
=3D>      63  83886017  da1  MBR  (40G)
        63  83886017       - free -  (40G)

2. Expand the disk capacity from 40GB to 50GB by Hyper-V management tool.

3.=20
[root@decui-b11 ~]# dd if=3D/dev/da1 of=3D/dev/null bs=3D512 count=3D1
1+0 records in
1+0 records out
512 bytes transferred in 0.000715 secs (715864 bytes/sec)
[root@decui-b11 ~]# gpart show  da1
=3D>      63  83886017  da1  MBR  (50G)
        63  83886017       - free -  (40G)

We can see the 'free' space can't grow to 50GB.

4. This can't help:
[root@decui-b11 ~]# camcontrol reprobe da1
[root@decui-b11 ~]# gpart show  da1
=3D>      63  83886017  da1  MBR  (50G)
        63  83886017       - free -  (40G)

--=20
You are receiving this mail because:
You are the assignee for the bug.=

Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-211028-8>