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Bug 1058145

Summary: fail to create VPC file format disk with large size using qemu-img
Product: Red Hat Enterprise Linux 7 Reporter: Sibiao Luo <sluo>
Component: qemu-kvmAssignee: Jeff Cody <jcody>
Status: CLOSED WONTFIX QA Contact: Virtualization Bugs <virt-bugs>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.0CC: bsarathy, chayang, jcody, juzhang, knoel, kwolf, michen, mkenneth, qzhang, rbalakri, virt-maint, xfu
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: 999763 Environment:
Last Closed: 2015-01-27 20:05:36 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 999763    
Bug Blocks:    

Comment 1 Sibiao Luo 2014-01-27 05:26:46 UTC
Host info:
# uname -r && rpm -q qemu-kvm-rhev

# qemu-img create -f vpc sluo-data-disk.vpc 2031G
Formatting 'sluo-data-disk.vpc', fmt=vpc size=2180769644544 
# qemu-img create -f vpc sluo-data-disk.vpc 2032G
Formatting 'sluo-data-disk.vpc', fmt=vpc size=2181843386368 

# qemu-img create -f vpc sluo-data-disk.vpc 2033G
Formatting 'sluo-data-disk.vpc', fmt=vpc size=2182917128192 
qemu-img: sluo-data-disk.vpc: The image size is too large for file format 'vpc'
# qemu-img create -f vpc sluo-data-disk.vpc 2034G
Formatting 'sluo-data-disk.vpc', fmt=vpc size=2183990870016 
qemu-img: sluo-data-disk.vpc: The image size is too large for file format 'vpc'

Comment 3 Jeff Cody 2014-07-22 19:54:57 UTC
VHD/VPC (_not_ VHDX) maximum file size is 2040GB.  qemu-img seems to work only up to 2032GB in image creation.  However, for larger disks for Hyper-V (VirtualPC itself only supports 127GB images), the VHDX format would almost certainly be used anyway.