Displaying 20 results from an estimated 3000 matches similar to: "Suggestions on building VM disks from scratch"
2003 Jul 02
6
help: booting dos from syslinux/memdisk
Thanks for Remko for his help to solve the fractional cylinder problem.
But there is the second problem, the boot disk failure (see below << [B])
...
command line: initrd=disk.img harddisk c=2 h=256 s=63 BOOT_IMAGE=memdisk
Disk is hard disk, 16128K CHS=2/256/63 <<<< [A]
...
Loading boot sector... booting...
SYSLINUX 2.04
welcome!
boot: 1
[single dot]
2013 May 24
1
Failed to create /dev/loop0p* entries for partitions inside loopback devices
centos 6 failed to create entries under /dev for newly created loopback devices. Any one know why? and how to fix/workaround it?
The steps to duplicate is pretty simple
dd if=/dev/zero of=/tmp/deleteme bs=1M count=100
losetup /dev/loop0 /tmp/deleteme
fdisk /dev/loop0?? ## created partitions 1, 2, etc.
fdisk -l /dev/loop0? ## confirmed that the partitions do exist
mkfs.ext3 /dev/loop0p1 ## failed
2009 Aug 20
3
No swap on domU
Hi guys.
DomU config
disk = [
''phy:/dev/xen00/debian5-base,sda1,w'',
''phy:/dev/xen00/debian5-swap,sda2,w'',
]
-----------------------
mkswap /dev/xen00/debian5-swap
But in domU in booting:
Activating swap...failed.
What wrong?
--
Best Regards,
alex.faq8@gmail.com
2011 Jan 12
1
Centos 5.5 KVM GRUB / Virtio issue
I have a virtual machine that had been running fine using a RAW disk
image (IDE).
I am in the process of converting this virtual machine to use a single
LVM and virtio. (For LVM backup snapshots and easy resizing purposes (no
LVM within the guest))
I create the LVM and copied all the files from the existing RAW image to
an ext3 under the LVM.
However, I cannot get it to boot. It has to do
2008 Apr 07
6
img file to physical disk
Hi all.
I''ve got a domU that exists in a sparse file image, I''d like to now use
this on a physical partition (loopback performance issues).
Is there an a easy way to do this ?
Thanks
Stuart
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http://lists.xensource.com/xen-users
2006 Aug 23
2
question on mounting a partition that is in a disk image
How do I mount a partition that is in an image file?
I have a file called centos.img that has 3 partitions in the file.
I need to copy data to the third partition on that image file.
I have seen things about a loop back device (which is fine)
but then it talked about an offset parameter and I dont know what
that is or more importantly what number to use. I hope I'm on the
right track.
How
2024 Nov 22
1
EFI 64bit and Kernel 32 bit [redux]
Hi
Apologies for referring back to an old thread, but in this
conversation https://www.syslinux.org/archives/2018-October/026198.html
Thomas and Ady seemed to suggest that booting 32-bit linux from 64-bit
EFI was possible with the patched 6.04-pre version of syslinux that
Debian are using.
When I try this, all I get is
Loading ../../bzImage...ok
Loading ../../imgpt4.gz...ok
and then nothing.
2018 Mar 07
2
kpartx can not detach
OS: EL6 - sometimes I use
kpartx -a /mnt/.../lvdisk.img
to map the partitions and mount them via
/dev/mapper/loop0pX
After using the disk (unmounting it) I noticed that
detaching such mapping via kpartx -d does not result
in freeing up the loop devices. Results: System reboots
shows that the filesystem where lvdisk.img is located
can't be unmounted.
lsof, fuser, ps does not show
2008 Sep 29
3
LVM related bug in the GPL PV drivers for Windows?
Dear Xen users!
In case you were struggling with recent version of th gplpv drivers,
I''ve possibly found an LVM related bug in it, and reported to James
Harper. Thats''s the point:
I''ve tested the mentioned version of your driver on top of 32bit
xen-3.2.1 32bit xen-3.3.0 and 64bit xen xen-3.3.0 hypervisors, dom0 was
always an appropriate version of a 32bit PAE kernel,
2012 Nov 04
1
syslinux installation problem
Hey, guys.
I have a problem when installing syslinux 4.06, and I'd be grateful if someone could tell me how to solve the problem.
My task - to install the bootloader on the virtual machine image. The image contains the MBR and the only partition with the file system ext4. The file system contains all the files for the guest OS.
To install bootloader into the image of the guest OS, I use the
2008 Dec 26
7
Installing domU from ISO image file
I am trying to install CentOS from an ISO image file but the installer does
not see a CD-ROM drive. The VNC viewer works but the CentOS installer
indicates "Unable to find any devices of the type needed for this
installation type." Then it prompts with "[Select driver] [Use a driver
disk] [Back]". I have tried several variations of the "disk" paramater, all
2009 Feb 25
3
HVM Linux DomU doesn''t start
Hi all,
we are running two servers with Ubuntu 8.04 LTS Server with Xen 3.2 and two
dual-core CPUs:
processor : {0-3}
vendor_id : AuthenticAMD
cpu family : 15
model : 65
model name : Dual-Core AMD Opteron(tm) Processor 2218 HE
stepping : 3
cpu MHz : 2613.394
cache size : 1024 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
fpu :
2009 Nov 19
10
Unable to mount loopback devices in RAID mode
Hi!
I recently tried to mount a filesystem in RAID1 mode using loopback devices. I followed the instructions at [1]. Here''s exactly what I''ve done:
$ dd if=/dev/zero of=raid1_0.img bs=1M count=500
$ dd if=/dev/zero of=raid1_1.img bs=1M count=500
$ mkfs.btrfs -m raid1 -d raid1 raid1_0.img raid1_1.img
$ losetup /dev/loop0 raid1_0.img
$ losetup /dev/loop1 raid1_1.img
$ mount -t
2006 Aug 21
4
Making DOS/Win9x HD Image for memdisk
Hi list!
I'm trying to make a hd image with can boot from memdisk over PXE.
So this is what i did:
- Created a new VM [VMware]
-Installed DOS on a 100MB HD from a floppy
-bootet Linux over PXE [DamnSmallLinux]
-in terminal: dd if=/dev/hda of=dos.img
This image [dos.img] isn't working! Memdisk loads the Image and boots the
HD! The error message is something like this:
I/O Device
2005 Sep 20
4
standalone bootable usb-stick
hi ya syslinuxerz
- i've been slowly working on a making a custom bootable
standalone usb-stick with X11 and kde
- it's basically builds itself off of a slackware-10.1 server
- create a custom initrd.gz ( /dev/ram0 )
http://linux-boot.net/Bootable/InitRD/
- create a custom rootfs.gz ( /dev/loop0 )
http://linux-boot.net/Bootable/RootFS/
- create X11 and kde loopfiles
2007 Dec 19
2
Resizing a Xen DomU disk image
Hello Mailing List!
A quick question. Has anyone gotten a resize (in my case grown) a Xen
DomU disk image?
Here is the procedure I have followed:
1. Install a DomU using virt-install
Customize xvda to be all one partition ext3
2. On Dom0:
dd if=/dev/zero bs=1G count=1 >> <my_disk_image>
ll -h (Image is now 1GB larger)
xm create <DomU>
On DomU:
df -h (Size has not
2008 Nov 01
2
Patching your own boot-disk from first principles
Hi,
I'm trying to build a bootable MSDOS disk and put it on a ISO with floppy and hard disk emulation. I want to use commonly available Linux tools like dd, losetup, mkdosfs, memdisk etc.
I have done the following:
1. dd if=/dev/zero of=myImage bs=1M count=50 [ Builds a 52MB image ]
2. losetup /dev/loop0 myImage [Links /dev/loop0 to myImage file ]
3. vi /grub/stage1; %!xxd; [ NULL the partion
2009 Jul 11
1
[PATCH node] fix mount_live again
fixes install from ISO
---
scripts/ovirt-functions | 12 +++++++-----
1 files changed, 7 insertions(+), 5 deletions(-)
diff --git a/scripts/ovirt-functions b/scripts/ovirt-functions
index e01ee0e..3f55656 100644
--- a/scripts/ovirt-functions
+++ b/scripts/ovirt-functions
@@ -249,11 +249,13 @@ mount_live() {
return 0
fi
local live_dev=/dev/live
- if [ ! -e $live_dev ]
2007 Mar 26
1
Backing Up A Xen Guest
Here's the problem. We perform full tar backups of our CentOS 4/5
machines in real-time at regular intervals. And when a disaster happens,
we are able to restore those backups onto virgin filesystems, make
the /dev/null, /dev/zero and /dev/console devices .. and boot the
machine.
This has worked well on standalone systems, and also on Xen 3.0.3 guests
on CentOS 4.4 machines, where each guest
2004 Oct 12
3
Problem with VBD
Hi!
$ xm create -n -f xmtest
Using config file "xmtest".
(vm
(name testdomain)
(memory 128)
(image
(linux
(kernel /boot/vmlinuz-2.6.8-foo1-XenU)
(ip :1.2.3.4:::tesmo:eth0:dhcp)
(root ''/dev/xda1 ro'')
(args 1)
)
)
(device (vbd (uname phy:loop0) (dev xda1) (mode w)))
(device (vif (mac