Thanks Stefanha. If we use the commad virsh attach-disk rhel64-64 /home/images/virtio- scsi11.img --persistent sdr --cache writethrough the qcow2 images will also gets added as raw which is by default. Hence we should use
"virsh attach-disk rhel64-64 /home/images/virtio-scsi11.img --persistent sdr --cache writethrough --sourcetype file --driver qemu --subdriver qcow2". -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1197663 Title: qcow2 [virtio-scsi] devices when mapped to the guest shows as 0MB irrespective of the volume size Status in QEMU: Invalid Status in Fedora: New Bug description: qcow2 [virtio-scsi] devices when mapped to the guest shows as 0MB irrespective of the volume size. Kernel Version: 3.10.0-rc5+ Libvirt Version: 1.0.6 Qemu Version: 1.5.50 Steps to reproduce the issue: 1. Create a qcow2 voulme using the command qemu-img create -f qcow2 virtio-scsi11.img 10G 2. Add the virtio-scsi controller <controller type='scsi' index='0' model='virtio-scsi'> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </controller> 3. Attach the qcow2 device to the guest, virsh attach-disk rhel64-64 /home/images/virtio-scsi11.img --persistent sdr --cache writethrough 4. Run the scan commnad echo ' - - - ' > /sys/class/scsi_host/host#/scan, if the attached volume doesn't get recognize. 5. Check the dmesg for the added volume. 6. Run fdisk -l command Disk /dev/sdl: 0 MB, 197120 bytes 1 heads, 1 sectors/track, 385 cylinders, total 385 sectors Units = cylinders of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 And observe that the 10G qcow2 volume shows as 0MB. This is not seen with the raw image. Disk /dev/sdm: 10.7 GB, 10737418240 bytes 64 heads, 32 sectors/track, 10240 cylinders Units = cylinders of 2048 * 512 = 1048576 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Expected Result: The volume size for the qcow2 volumes should be shown correctly inside the guest to avoid confusion. Guest XML: virsh dumpxml rhel64-64 <domain type='kvm' id='4'> <name>rhel64-64</name> <uuid>48deb0e1-0c23-9be9-da12-2ead34864de2</uuid> <memory unit='KiB'>4096000</memory> <currentMemory unit='KiB'>4096000</currentMemory> <vcpu placement='static'>1</vcpu> <resource> <partition>/machine</partition> </resource> <os> <type arch='x86_64' machine='pc-i440fx-1.5'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/local/bin/qemu-system-x86_64</emulator> <disk type='file' device='disk'> <driver name='qemu' type='qcow2' cache='none'/> <source file='/home/images/rhel64-64.qcow2'/> <target dev='hda' bus='ide'/> <alias name='ide0-0-0'/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/home/upstream/autotest/virt-test/shared/data/isos/RHEL-6.4-x86_64-DVD.iso'/> <target dev='hdb' bus='ide'/> <readonly/> <alias name='ide0-0-1'/> <address type='drive' controller='0' bus='0' target='0' unit='1'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='writethrough'/> <source file='/home/images/virtio-scsi11.img'/> <target dev='sda' bus='scsi'/> <alias name='scsi0-0-0-0'/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='writethrough'/> <source file='/home/images/virtio-scsi1.img'/> <target dev='sdf' bus='scsi'/> <alias name='scsi0-0-0-5'/> <address type='drive' controller='0' bus='0' target='0' unit='5'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='writethrough'/> <source file='/home/images/virtio-scsi9.img'/> <target dev='sdg' bus='scsi'/> <alias name='scsi0-0-0-6'/> <address type='drive' controller='0' bus='0' target='0' unit='6'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='writethrough'/> <source file='/home/images/virtio-scsi8.img'/> <target dev='sdh' bus='scsi'/> <alias name='scsi1-0-0'/> <address type='drive' controller='1' bus='0' target='0' unit='0'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='writethrough'/> <source file='/home/images/virtio-scsi10.img'/> <target dev='sdi' bus='scsi'/> <alias name='scsi1-0-1'/> <address type='drive' controller='1' bus='0' target='0' unit='1'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='writethrough'/> <source file='/home/images/virtio-scsi7.img'/> <target dev='sdk' bus='scsi'/> <alias name='scsi1-0-3'/> <address type='drive' controller='1' bus='0' target='0' unit='3'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='writethrough'/> <source file='/home/images/virtio-scsi6.img'/> <target dev='sdl' bus='scsi'/> <alias name='scsi1-0-4'/> <address type='drive' controller='1' bus='0' target='0' unit='4'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='writethrough'/> <source file='/home/images/virtio-scsi5.img'/> <target dev='sdm' bus='scsi'/> <alias name='scsi1-0-5'/> <address type='drive' controller='1' bus='0' target='0' unit='5'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='writethrough'/> <source file='/home/images/virtio-scsi12.img'/> <target dev='sdn' bus='scsi'/> <alias name='scsi1-0-6'/> <address type='drive' controller='1' bus='0' target='0' unit='6'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='writethrough'/> <source file='/home/images/virtio-scsi11.img'/> <target dev='sdr' bus='scsi'/> <alias name='scsi2-0-3'/> <address type='drive' controller='2' bus='0' target='0' unit='3'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='writethrough'/> <source file='/home/images/virtio-scsi2.img'/> <target dev='sdx' bus='scsi'/> <alias name='scsi3-0-2'/> <address type='drive' controller='3' bus='0' target='0' unit='2'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='writethrough'/> <source file='/home/images/virtio-scsi4.img'/> <target dev='sdy' bus='scsi'/> <alias name='scsi3-0-3'/> <address type='drive' controller='3' bus='0' target='0' unit='3'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='writethrough'/> <source file='/home/images/virtio-scsi3.img'/> <target dev='sdz' bus='scsi'/> <alias name='scsi3-0-4'/> <address type='drive' controller='3' bus='0' target='0' unit='4'/> </disk> <controller type='usb' index='0'> <alias name='usb0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> </controller> <controller type='ide' index='0'> <alias name='ide0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <controller type='pci' index='0' model='pci-root'> <alias name='pci0'/> </controller> <controller type='scsi' index='0' model='virtio-scsi'> <alias name='scsi0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </controller> <controller type='scsi' index='1'> <alias name='scsi1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </controller> <controller type='scsi' index='2'> <alias name='scsi2'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/> </controller> <controller type='scsi' index='3'> <alias name='scsi3'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/> </controller> <interface type='network'> <mac address='52:54:00:9d:cf:bb'/> <source network='default'/> <target dev='vnet0'/> <model type='rtl8139'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <source path='/dev/pts/1'/> <target port='0'/> <alias name='serial0'/> </serial> <console type='pty' tty='/dev/pts/1'> <source path='/dev/pts/1'/> <target type='serial' port='0'/> <alias name='serial0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='5900' autoport='yes' listen='127.0.0.1'> <listen type='address' address='127.0.0.1'/> </graphics> <video> <model type='cirrus' vram='9216' heads='1'/> <alias name='video0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <alias name='balloon0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </memballoon> </devices> <seclabel type='none' model='selinux'/> </domain> To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1197663/+subscriptions