Bugzilla (bugzilla.redhat.com) will be under maintenance for infrastructure upgrades and will not be unavailable on July 31st between 12:30 AM - 05:30 AM UTC. We appreciate your understanding and patience. You can follow status.redhat.com for details.
Bug 593256 - Unable to set readonly flag for floppy disks
Summary: Unable to set readonly flag for floppy disks
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: qemu-kvm
Version: 6.0
Hardware: All
OS: Linux
Target Milestone: rc
: ---
Assignee: Gerd Hoffmann
QA Contact: Virtualization Bugs
Depends On:
Blocks: 593237
TreeView+ depends on / blocked
Reported: 2010-05-18 10:35 UTC by Daniel Berrangé
Modified: 2013-01-09 22:35 UTC (History)
6 users (show)

Fixed In Version: qemu-kvm-
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2010-07-11 19:34:22 UTC
Target Upstream Version:

Attachments (Terms of Use)

Description Daniel Berrangé 2010-05-18 10:35:56 UTC
Description of problem:
Attempting to set a readonly floppy fails with

qemu: readonly flag not supported for drive with this interface

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

How reproducible:

Steps to Reproduce:
1. /usr/libexec/qemu-kvm -M rhel6.0.0  -drive file=/var/lib/libvirt/images/fd.img,if=none,id=drive-fdc0-0-0,readonly=on,format=raw  -global isa-fdc.driveA=drive-fdc0-0-0
Actual results:
qemu: readonly flag not supported for drive with this interface

Expected results:
QEMU boots

Additional info:

Comment 1 RHEL Program Management 2010-05-18 10:55:39 UTC
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release.  Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release.  This request is not yet committed for

Comment 2 Gerd Hoffmann 2010-05-26 12:28:01 UTC
Patch posted upstream, kwolf picked it into the block branch.

Comment 6 Mike Cao 2010-06-08 05:06:38 UTC
Reproduce it in qemu-kvm-

Verified in qemu-kvm-

Steps :
1.start VM with readonly floppy
#/usr/libexec/qemu-kvm -m 512 -smp 1,sockets=1,cores=1,threads=1 -name tt -uuid `uuidgen` -rtc-td-hack -boot c -drive file=/home/win7_64,if=none,id=drive-ide0-0-0,boot=on,format=raw -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -drive file=/home/virtio-drivers.vfd,readonly=on,if=none,id=drive-fdc0-0-0 -global isa-fdc.driveA=drive-fdc0-0-0 -net nic,macaddr=20:40:50:12:23:21,model=virtio,vlan=0 -net tap,script=/etc/qemu-ifup,vlan=0 -vnc :8 -monitor stdio
2.In the qemu monitor ,check floppy status by using (qemu)info block
3.In the guest ,check floppy disk is readonly or not.

Actual Results:
After step2:drive-fdc0-0-0: type=hd removable=0 file=/home/virtio-drivers.vfd ro=1 drv=raw encrypted=0
After step3,Can not write in the floppy disk.the disk is readonly mode.

Readonly flag can be used for floppy disks
the bug has already been fixed.

Comment 8 lihuang 2010-07-11 19:34:05 UTC
closing according to #c6

Note You need to log in before you can comment on or make changes to this bug.