[Xen-devel] Re: Getting xen to recognise large disks

[Robin Bowes <robin-lists@xxxxxxxxxxxxxx>]

Daniel P. Berrange wrote:
> blkfront is the device driver for the DomU guest kernel, rather than Dom0.
> Also in Fedora, the 'xen' RPM only contains the userspace parts of xen
> for Dom0. The hypervisor & kernel itself are in the kernel-xen RPM (which
> is one of many built from the kernel SRPM).
> 
> FYI, I opened a bugzilla against Fedora to track this problem since I can
> also trivially reproduce it by creating a (sparse) 5 TB block device and
> exporting it to a guest.
> 
> https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=216555
> 
> On x86_64 meanwhile everything is sizing up correctly - I succesfully
> exported a 15 PB (yes, PB) block device to a PV guest.

OK, I'll track that bug.

This is going to be one of the longest server builds on record! I've got
2x250GB drives mirrored as the "system" drive, plus 8x500GB drives as
the "data" drive, configured in RAID6.

After getting over all the hardware problems, I found that grub only
supports up to 8 disks, so I had to patch it to support 16 disks.

Now I'm finding that xen guests have problems with big disks.

<sigh>

I'll get there eventually!

R.


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