Bug 616743

Summary:	slow to format qcow2 disk
Product:	Red Hat Enterprise Linux 6	Reporter:	Suqin Huang <shuang>
Component:	qemu-kvm	Assignee:	Virtualization Maintenance <virt-maint>
Status:	CLOSED DUPLICATE	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	low
Version:	6.1	CC:	mkenneth, tburke, virt-maint
Target Milestone:	rc	Keywords:	RHELNAK
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2010-07-22 11:19:03 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:

Description Suqin Huang 2010-07-21 10:20:55 UTC

Description of problem:
it takes around 90mins to format 10G qcow2 disk in win08 and win7 guest.

Version-Release number of selected component (if applicable):
qemu-img-0.12.1.2-2.96.el6.x86_64

How reproducible:
100%

Steps to Reproduce:
1. boot guest
/qemu -name 'vm1' -monitor stdio \
-drive file='images/win2008r2-64.qcow2',if=none,id=drive-ide0-0-1,media=disk,cache=none,format=qcow2 -device ide-drive,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1 \
-drive file='/storage.qcow2',if=none,id=drive-ide0-1-0,media=disk,cache=none,format=qcow2 \
-device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 \
-net nic,vlan=0,netdev=idQ7kmUl,model=rtl8139,macaddr='02:2D:4B:53:9c:ee' -netdev tap,id=idQ7kmUl,,script='/qemu-ifup-switch',downscript='no' -m 4096 -smp 2 -vnc :0 -rtc base=localtime,clock=host -M rhel6.0.0 -usbdevice tablet -cpu qemu64,+sse2 -no-kvm-pit-reinjectio

2. format 10G disk
format E: /FS:NTFS /V:local /Q /y

3.
  
Actual results:


Expected results:


Additional info:
it takes around 90mins in windows08 ans win7 guests.
and quick in XP and window2003 guests

Comment 2 Suqin Huang 2010-07-21 10:27:32 UTC

format cmd:
format E: /FS:NTFS /V:local /y

format the same disk several times, only the first time is slow.

Comment 3 RHEL Program Management 2010-07-21 10:37:47 UTC

This issue has been proposed when we are only considering blocker
issues in the current Red Hat Enterprise Linux release.

** If you would still like this issue considered for the current
release, ask your support representative to file as a blocker on
your behalf. Otherwise ask that it be considered for the next
Red Hat Enterprise Linux release. **

Comment 4 Dor Laor 2010-07-22 11:19:03 UTC


*** This bug has been marked as a duplicate of bug 615152 ***