Xen users - Aug 2012 - How to install pv guests with tap2:aio for remus

Hi Guys,

I''m working with:

   1. xen 4.1;
   2. dom0 ubuntu kernel 3.2

I''m trying to run remus with disk replication (I can run without disk
replication). But I read I need to use tap2 <
http://nss.cs.ubc.ca/remus/doc.html>.
Well... first I tried to create a pv guest. Then I take this guest.cfg:

   1. name = "ubuntu-ha"
   2. memory = 256
   3. disk =
[''tap*2*:tapdisk:aio:/var/lib/xen/images/ubuntu-ha.img,xvda,w'']
   4. vif = ['' '']
   5. kernel = "/var/lib/xen/images/ubuntu-netboot/vmlinuz"
   6. ramdisk = "/var/lib/xen/images/ubuntu-netboot/initrd.gz"
   7. extra = "debian-installer/exit/always_halt=true -- console=hvc0"

And I run "xm console guest.cfg -c" and I get the following error:

   - Error: (''create'',
''-aaio:/var/lib/xen/images/ubuntu-ha.img'') failed
   (55808 blktap kernel module not installed )

Others stuffs:

   1. There is ''blktap'' in /etc/modules (Is there blktap2 and
I must put
   there?);
   2. In line 3, I tried "disk
[''tap*2*:aio:/var/lib/xen/images/ubuntu-ha.img,xvda,w'']
   and I got the same error;
   3. I also tried "disk   
[''tap:aio:/var/lib/xen/images/ubuntu-ha.img,xvda,w'']" or 
"disk   
[''tap:tapdisk:aio:/var/lib/xen/images/ubuntu-ha.img,xvda,w'']"
and I got the
   following error in boot: "XENBUS: Waiting for devices to initialise:
   295s...290s...285s...280s...". I even can do some steps, but the OS
   installation advises that no disk drive was detected. I expected this.
   4. Could I run remus with disk replication using "disk
[''*file*:/var/lib/xen/images/ubuntu-ha.img,xvda,w'']"?
   Case yes, how to do this?

Does someone have a suggestion?
Thanks


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