search for: is_disk_image

...VM LV that serves as the root disk for a Xen DomU contains a boot > loader (or possibly other data) in its volume boot record, pygrub fails to boot > it, printing "Error: boot loader didn't return any data" before exiting. > > I think this is because of the function "is_disk_image" on line 45 of > /usr/lib/xen-4.1/bin/pygrub: it should return false on LVM LV's because they > are not disk images but virtual devices, but it returns true because of certain > bytes in the first block of 512 bytes being set. This causes > get_partition_offsets to seek fruitle...

...important When an LVM LV that serves as the root disk for a Xen DomU contains a boot loader (or possibly other data) in its volume boot record, pygrub fails to boot it, printing "Error: boot loader didn't return any data" before exiting. I think this is because of the function "is_disk_image" on line 45 of /usr/lib/xen-4.1/bin/pygrub: it should return false on LVM LV's because they are not disk images but virtual devices, but it returns true because of certain bytes in the first block of 512 bytes being set. This causes get_partition_offsets to seek fruitlessly for a partition...

Fix for pygrub path on Solaris. Signed-off-by: John Levon <john.levon@sun.com> diff --git a/tools/python/xen/xend/XendDomainInfo.py b/tools/python/xen/xend/XendDomainInfo.py --- a/tools/python/xen/xend/XendDomainInfo.py +++ b/tools/python/xen/xend/XendDomainInfo.py @@ -37,7 +37,7 @@ from xen.util.blkif import blkdev_uname_ from xen.util.blkif import blkdev_uname_to_file from xen.util

Package: xen-utils-4.1 Version: 4.1.3-7 Severity: normal The function is_disk_image in /usr/lib/xen-4.1/bin/pygrub at line 45 distinguishes a partitioned disk from a partition by looking for 0xaa55 at offset 0x1fe in the image, but this is the bootsector signature, not the partition table signature. extlinux and other bootloaders put this signature there on bootable partitions (w...