<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 TRANSITIONAL//EN"> <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; CHARSET=UTF-8"> <META NAME="GENERATOR" CONTENT="GtkHTML/3.12.3"> </HEAD> <BODY> Run kpartx to create the devices - will be created in /dev/mapper kpartx -a /dev/loop0 On Tue, 2007-03-27 at 15:32 -0600, Lamont Peterson wrote: <BLOCKQUOTE TYPE=CITE> <PRE> All, I need to create some images that pygrub can boot (on FC6 & RHEL5). IIUC, that means that the image file must be a disk image complete with partition table. The trouble I'm running into is figuring out how to access the "partition" within the disk image file as a block device. This is necessary in order to format or mount the filesystems and run mkswap for the disk image's swap partition. Here's what I have so far. 1. Create the disk image file, ala "dd if=/dev/zero of=/var/lib/xen/images/someVM/sda bs=1k seek=4608k count=1" 2. Create partitions with fdisk (this requires setting the number of cylinders, but that's easy). 3. losetup /dev/loop0 /var/lib/xen/images/someVM/sda At this point, I can run "fdisk -l /dev/loop0" and get: Disk /dev/loop0: 4831 MB, 4831839232 bytes 255 heads, 63 sectors/track, 587 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/loop0p1 1 523 4200966 83 Linux /dev/loop0p2 524 588 522112+ 82 Linux swap / Solaris However, there is no /dev/loop0p1 or /dev/loop0p2 devices and I'm not sure what to do to make those accessible. I need to be able to "mke2fs -j /dev/loop0p1" and "mkswap /dev/loop0p2" or equivalent. Then I need to mount /dev/loop0p1 to copy files to it. How can I access partitions inside a disk image as block devices? Should I be using something other than losetup here? -- Fedora-xen mailing list <A HREF="mailto:Fedora-xen@redhat.com">Fedora-xen@redhat.com</A> <A HREF="https://www.redhat.com/mailman/listinfo/fedora-xen">https://www.redhat.com/mailman/listinfo/fedora-xen</A> </PRE> </BLOCKQUOTE> </BODY> </HTML>