search for: qcow

For many months now we have been trying to create a file-backed qcow image with the qcow-create code. Each time we try to back a file with a qcow, it screams: *** buffer overflow detected ***: qcow-create terminated Below is the output from two different attempts and information about qcow-create. Any ideas/thoughts/help you can offer? Thank you for your h...

After snapshot-delete, the qcow2 image file size doesn't decrease, isn't that a waste of disk space? Would someone please tell me how to decrease the file size when snapshot-delete, if that's possible? The image file name of my virtual machine is d0.qcow As follows: [root at test1 ]# virsh list Id Name...

Hi! Changeset 17913 breaks build on *BSD: block-qcow.c:36:20: error: gcrypt.h: No such file or directory cc1: warnings being treated as errors block-qcow.c: In function ''gen_cksum'': block-qcow.c:160: warning: implicit declaration of function ''gcry_md_hash_buffer'' block-qcow.c:160: error: ''GCRY_MD_MD5'...

...try of stubdom, whose general status is good. One issue we found is with aio/sync blktap as backend, disk performance is obviously slower, and there are some IDE kernel error messages (like irq timeout) at boot time. Another issue (not stubdom specific) comes from blktap''s support for QCOW image which is based on a backing file. We never tried this configure before. The root cause is that in tdqcow_get_parent_id(), the backing file is hard-coded to be QCOW type and tdqcow_validate_parent() also presumes it, though the backing file is a raw image normally. With the image type set...

Hi, Trying to understand the current state of affairs with QCOW support in Xen with the blktap driver. It''s been made clear that a deviation from QEMU''s implementation of QCOW has occurred and that the QCOW files used in Xen must be created with the associated Xen tools only (e.g. qcow-create) and that images between QEMU and Xen are not inte...

Hi Is it true that the GPLPV drivers is incompatible with QCOW images? The Windows DomU works fine with raw standard "file:/" images, and paravirtualized Linux DomU works fine with QCOW and raw images. If i use QCOW images with my Windows DomU''s i get a stop error: 0x00000007b (inaccessible boot device). It looks like the blkback.3.hda...

...patch containing the (new and improved) blktap Linux driver and associated userspace tools for Xen. In addition to being more flavourful, containing half the fat, and removing stains twice as well as the old driver, this stuff adds a userspace block backend and let you use raw (without loopback), qcow, and vmdk-based image files for your domUs. There''s also a fun little driver that provides a shared-memory block device which, in combination with OCFS2, represents a cheap-and-cheerful fast shared filesystem between multiple domUs. This code has been (somewhat lackadaisically) developed...

Hi, I want to ask if anyone of you is familiar with QCOW and has used this with xen? I''ve googled a bit about and could''nt really find out if it''s a good choice or not. Has anyone experience with usage in xen and can say something about performance and snapshot usability? Thanks in advance, Alex __________________________...

All, is it possible to create a new KVM machine from an existing qcow (v3) image with snapshots? snapshot-list doesn't show them, when using virt-manager 1:1.5.1-0ubuntu1.1 to create the machine. * t-ad5.img: QEMU QCOW Image (v3), 42949672960 bytes chris@cd:/data/md0$ qemu-img snapshot -l t-ad5.img Snapshot list: ID TAG VM SIZE...

Hi,guys, During a HVM''s running which take a qcow format image file as its own virtual disk, the qcow image file will be always read.In the situation that its qcow format image is based on a raw format image, if nesethe backingfile ,just that raw format image file,would be read .my purpose is to cache the data that is read from the backingfile wh...

Hello, This is a second post, with a trial which is different from the first one , in order to solve my blcok-attach problem. I tried the following two actions, according to the blktap readme: qcow-create 1000 qcowFile.img Creating file size 1048576000 Created cksum: 1813725440 then xm block-attach 0 tap:qcow:qcowFile.img /dev/xvda1 w 0 I see in the /var/log/xen/xend.log: [2007-03-13 11:03:32 xend 2423] DEBUG (blkif:24) exception looking up device number for /dev/xvda1: [Errno 2] No su...

I have a qcow file It shows correct size on one server Fdisk -l w.qcow 70 GB On the other server Fdisk w.qcow 0 MB stupid

Before, in my "Hard Problem" email I was trying to communicate a design issue were trying to solve with Xen. This is what we need to do: 1) Deploy 24 Windows XP VMs in parallel. 2) Boot them from a shared Windows XP C: drive. 3) Since this is a read-only shared image we obviously can''t have multiple VM''s writing to it. 4) All writes to the boot image for logging,

Before, in my "Hard Problem" email I was trying to communicate a design issue were trying to solve with Xen. This is what we need to do: 1) Deploy 24 Windows XP VMs in parallel. 2) Boot them from a shared Windows XP C: drive. 3) Since this is a read-only shared image we obviously can''t have multiple VM''s writing to it. 4) All writes to the boot image for logging,

Dear,Beg for your help. I am really puzzled with this problem.HVM domain can not boot up with Qcow incremental image(using command: qcow-create size incremental_file original_Qcow_img_file), but it can boot up with the original Qcow disk image file. When using Qcow incremental image, the guest qemu window would disappear before loading grub, and `xm list` can not find this guest domain.The VM s...

...riginal XML domain definition 3. create snapshot in libvirt like this: virsh snapshot-create --xmlfile snap.xml --disk-only --no-metadata test-domain snap.xml: <domainsnapshot> <disks> <disk name='/dev/zstore/test-volume'> <source file='/tmp/test-volume.qcow2'/> </disk> </disks> </domainsnapshot> This creates overlay qcow snapshot on top of my base ZFS volume 3. Transfer ZFS volume (with last snapshot) to remote host 4. Run live migration with setting XML from step 1 as DestXML and PersistXML parameter and with VIR_MIG...

Hi, i would like to use qcow2-sparse-images which point to a backup-file. After reading this: http://wiki.xensource.com/xenwiki/DmUserspace i figured out that this feature seems to be unsupported by the ubuntu 8.04 LTS kernel and xen-3.2.1. Is this a ubuntu-specific problem, or is it solved in Suse, Red Hat, XenSource, whatev...

Hi There, I''ve been trying to get this to work for the last couple of days, but found no information on the internet that would help. Essentially, a tap-ctl opencommand with a qcow2 image does not work (error code 2) and produces the following line in syslog: tap-ctl: tap-err:tap_ctl_open: open failed, err -2 I have attached a shell script that reproduces the problem on my machine. The same script works fine if I use image format raw and the aio: prefex to the -a option. M...

...n of my virtual machines. I recovered my virtual machines on the new laptop (virsh define) using the backed up xml files, but I am missing any file with metadata about snapshots. The original storage is cleaned so I cannot take these files anymore. Using qemu-info I can see my snapshots inside the qcow images, but libvirt doesn't know about them: ########################################### # virsh snapshot-list rhlvm Name Creation Time State ------------------------------- # qemu-img info rhlvm.qcow2 image: rhlvm.qcow2 file format: qcow2 virtual size: 25G (26843545600 bytes) disk size:...

I''ve a problem with the syntax of qcow images on HVM guest. In my configuration file i''ve this string disk = [''tap:aio:/mnt/qcowwin,hda1,w''] Is it correct??? Windows installation cannot find the harddisk to proceed os installation... _______________________________________________ Xen-users mailing list Xen...