Bug 704478

Summary:	IDE disk with raw format image cannot be hot-plugged and hot-unplugged on Xen HVM
Product:	Red Hat Enterprise Linux 5	Reporter:	mliu
Component:	virt-manager	Assignee:	Cole Robinson <crobinso>
Status:	CLOSED NOTABUG	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	high
Version:	5.7	CC:	dyuan, mliu, mzhan
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-07-12 23:55:24 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description mliu 2011-05-13 09:58:33 UTC

Description of problem:
IDE disk with raw format image cannot be hot-plugged and hot-unplugged on Xen HVM

Version-Release number of selected component (if applicable):
virt-manager-0.6.1-14.el5
xen-3.0.3-130.el5
kernel-xen-2.6.18-259.el5

How reproducible:
Always

Steps to Reproduce:
1. Create a raw format volume in storage : raw.img
2. Open a running guest, here is rhel5.6, run #modprobe acpiphp
3. On the Hardware tab, click "Add Hardware"
4. Select "Storage" and forward
5. Browse raw.img as File(disk image), Device type is "IDE disk", Forward and Finish

6. Select "hdb" in the Hardware tab, and click "Remove"
  
Actual results:
After step5, There is no error, and the disk "hdb" is listed in Hardware tab, but on the guest console, run #ls /dev/hd* or #fdisk -l , there is no "hdb" disk.

After step6, the "hdb" is still in the list. Reboot the guest, "hdb" is disappeared.  

Expected results:
After step 5, the disk "hdb" should be added successfully. 
After step 6, the disk "hdb" should be removed successfully. We don't need to reboot guest.


Additional info:
It work well on virsh command:

# virsh attach-disk rhel5.6 /var/lib/libvirt/images/raw.img  hdb --driver file
Disk attached successfully

# virsh detach-disk rhel5.6 hdb
Disk detached successfully

Comment 1 mliu 2011-05-13 10:00:07 UTC

cow format image have the same issue, but qcow2 and vmdk image can work well.

Comment 2 RHEL Program Management 2011-06-21 05:25:06 UTC

This request was evaluated by Red Hat Product Management for inclusion in Red Hat Enterprise Linux 5.7 and Red Hat does not plan to fix this issue the currently developed update.

Contact your manager or support representative in case you need to escalate this bug.

Comment 4 Cole Robinson 2011-07-12 23:55:24 UTC

I don't think IDE devices are supposed to be hotpluggable at all. There is already a bug filed about this with xen. If I'm incorrect, please reopen