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xen-devel
Re: [Xen-devel] ioctl 0000126c not supported by XL blkif
On Thu, 7 Dec 2006, Ian Campbell wrote:
partx only makes this ioctl call if you have an odd number of sectors in
your diskimage, and only when trying to process an "EFI GUID Partition
Table" (whatever that is, I presume it is an IA64 thing, although the
partx code is unconditional).
I see lots of references to "odd" partition sizes in my google, but I'm
missing what 'odd' means in this context. 0dd as opposed to even? or
odd as in "not aligning with cyl boundaries" or something like that?
(I suppose my partitions listed below are odd in both respects)
I assume you aren't really using this type of partition table so I
expect it will fail harmlessly.
Do you have a disk setup which might cause it to think it needs to try
the more unusual partition types? Perhaps you are using an unpartitioned
disk of an odd size? That reproduced it for me.
we are using a systemimager floppy booted off qemu to create the DomU, so
this is the same partition layout that would be given to a physical box.
[root@DomU]# fdisk -l /dev/sda
Disk /dev/sda: 36.5 GB, 36531973632 bytes
255 heads, 63 sectors/track, 4441 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 16 128488+ 83 Linux
/dev/sda2 17 669 5245222+ 83 Linux
/dev/sda3 670 799 1044225 83 Linux
/dev/sda4 800 4441 29254365 f Win95 Ext'd (LBA)
/dev/sda5 800 930 1052226 83 Linux
/dev/sda6 931 4441 28202076 83 Linux
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