Bug 582102

Summary:	QEMU: cannot enable 'write caching' for IDE disks in Win7-32/64bit guests
Product:	Red Hat Enterprise Linux 5	Reporter:	Yaniv Kaul <ykaul>
Component:	kvm	Assignee:	chellwig <chellwig>
Status:	CLOSED WONTFIX	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	low
Version:	5.5	CC:	jkt, virt-maint, ykaul
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2010-12-02 09:31:08 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	580946

Description Yaniv Kaul 2010-04-14 06:30:18 UTC

Description of problem:
For some reason, while it may be possible to check the property, while OK'ing it I get an error that it failed to set it. Therefore, write caching for IDE devices cannot be enabled in the guest. It does work in XP.

Version-Release number of selected component (if applicable):
KVM 83-166

How reproducible:
Always

Steps to Reproduce:
1. In the Device Manager (run -> devmgmt.msc) go to 'Disk Drives' -> QEMU HARDDISK ATA
2. Right click, Properties, then 'Policies'
3. Try to check the disk caching checkbox and OK'ing the box.
  
Actual results:


Expected results:
Either not publish this support or better yet, enable the feature.

Additional info: