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



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.)

Laszlo


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