https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209443
Bug ID: 209443
Summary: [Hyper-V]FreeBSD 10.3 on Windows 2012 server may fail
to add/remove a disk by hot plugin
Product: Base System
Version: 10.3-RELEASE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Many People
Priority: ---
Component: kern
Assignee: freebsd-bugs@FreeBSD.org
Reporter: honz...@microsoft.com
CC: freebsd-am...@freebsd.org
CC: freebsd-am...@freebsd.org
FreeBSD 10.3 on windows 2012 R2 hyper-v may fail to hot add/remove a SCSI disk.
The reproduce steps are:
1. boot the system
2. add a vhd disk through hyperv manager settings: From SCSI Controller, add a
new virtual hard disk, select vhd and 1G size. Finally click "Apply"
3. From the hyperv manager console, we can see a new disk is added.
4. repeat the above step 2 and 3 twice to add two disks, but you can only see
one hot plugin disk. The first hot plugin disk is missing.
If you use "camcontrol rescan <bus:target:lun>" to rescan the missing device,
it will go back. But if you used this command issue twice rescan, the disk may
miss again.
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