Re: [Qemu-devel] fdisk still shows the "/dev/sdb" partitions even after the removal of scsi disk

[chandrashekar shastri]

On 06/13/2013 06:20 PM, Laszlo Ersek wrote:
> On 06/13/13 12:19, chandrashekar shastri wrote:
> > Hi,
> >
> > I have filed a bug "fdisk still shows the "/dev/sdb" partitions even
> > after the removal of scsi disk" for the upstream kernel.
> >
> > Bug link:
> > https://bugs.launchpad.net/qemu/+bug/1190525
> >
> > RHEL guest shows the partittions even after the removal of scsi disk:
> > fdisk still shows the "/dev/sdb" partitions even after the removal of
> > scsi disk.
> >
> > Guest details:
> > -------------------
> > Kernel : 2.6.32-358
> >
> > Host Details :
> >
> > Upstream Kernel, Qemu, Libvirt and virt-manager
> > ---------------------------------------------------------------------
> >
> > kernel version : 3.9.0+
> > qemu version : QEMU emulator version 1.5.0
> > libvirt version : 1.0.5
> > virt-install : 0.600.3
> >
> > Steps to reproduce the issue:
> >
> > I. Add the SCSI disk through the virt-manager.
> > 2. Create the partition using fdisk (eg: /dev/sbb)
> > 3. Create a filesystem and format using mkfs.ext3 or mkfs.ext4
> > 4. Remove the scsi disk through the virt-manager.
> > 5. Again run the fdisk /dev/sdb, the guests still shows the partition
> > even after the removal of the disk.
> >
> > This issue is not seen with virt-io disk.
> >
> > This issue is also reproducible without even creating the partitions.
> >
> > Expected Result:
> >
> > The output of fdisk /dev/sd* should not show the enties after the
> > removal of scsi disks
> What happens if you run "scsi-rescan --remove" or "scsi-rescan
> --forcerescan" in the guest? (Paolo had recommended this to me for an
> independent problem / case.)
Thanks for the input, I will try out and update the bug accordingly.

Regards,
Chandrashekar
> Laszlo