Hello everybody, I am sorry, but my english is very 
little. I have a problem that needs solving. 
 
I have a hard disk with "Xen-Server 4.0.1", and two 
250GB hard disks with a VM on each dik, the hard disk 1 has a linux VM and hard 
disk 2 has a windows VM. 
 
We wanted to try the "Xen-Server 5", so I took the 
disk with the version 4.0.1 and set another hard disk with "Xen-Server 5". 
 
Of the two hard disks having VMs 4.0.1, we are 
using the disk 2, so we wanted to allocate a new storage unit from version 5 to 
the disk 1, but was mistakenly assigned to disk 2, and now that put back the 
hard disk with XenServer 4.0.1 can not access. 
 
The command that was used is as 
follows:
 
xe sr-create type=lvm content-type=user 
device-config:device=/dev/disk/by-id/scsi-SATA_WDC_WD2500AAJS-_WD-WCAT17388822 
name-label="Disco 250GB Nro 2"
 
Just did that. We need to come back to the VM of 
the disk 2 from Xen-Server 4.0.1 
 
If someone can give me help, I will be greatly 
appreciated. 
 
Greetings ... 
 
Eduardo