OpenNebula

A VM template can use as many DATABLOCK images as you need.
But the target generation will go from 'e' to the number of DATABLOCKs used... which can be greater than 'z'.

This will create an invalid deployment.0

<domain type='kvm'>
        <name>one-76</name>

From the DB:

[...]
76|DISK|1|CLONE=YES@^_^@DISK_ID=21@^_^@IMAGE=DB_22@^_^@IMAGE_ID=33@^_^@READONLY=NO@^_^@SAVE=NO@^_^@SOURCE=/home/cloud/opennebula/var//ddf49476cb24d9bdcd25bea018587e440df02695@^_^@TARGET=hdz@^_^@TYPE=DISK
76|DISK|1|CLONE=YES@^_^@DISK_ID=22@^_^@IMAGE=DB_23@^_^@IMAGE_ID=34@^_^@READONLY=NO@^_^@SAVE=NO@^_^@SOURCE=/home/cloud/opennebula/var//41ff4c67360d3f5aec699b18b1a82d1666d37d6d@^_^@TARGET=hd{@^_^@TYPE=DISK
76|DISK|1|CLONE=YES@^_^@DISK_ID=23@^_^@IMAGE=DB_24@^_^@IMAGE_ID=35@^_^@READONLY=NO@^_^@SAVE=NO@^_^@SOURCE=/home/cloud/opennebula/var//2f310a5277ee77c658e5691565b8b6023c29f606@^_^@TARGET=hd|@^_^@TYPE=DISK
76|DISK|1|CLONE=YES@^_^@DISK_ID=24@^_^@IMAGE=DB_25@^_^@IMAGE_ID=36@^_^@READONLY=NO@^_^@SAVE=NO@^_^@SOURCE=/home/cloud/opennebula/var//a3438d812a0752c8dac7fa8fa822c3d4b443936b@^_^@TARGET=hd}@^_^@TYPE=DISK
76|DISK|1|CLONE=YES@^_^@DISK_ID=25@^_^@IMAGE=DB_26@^_^@IMAGE_ID=37@^_^@READONLY=NO@^_^@SAVE=NO@^_^@SOURCE=/home/cloud/opennebula/var//6677cf246d1a3ca5f8364b2bfce9272c57ae5c34@^_^@TARGET=hd~@^_^@TYPE=DISK
76|DISK|1|CLONE=YES@^_^@DISK_ID=26@^_^@IMAGE=DB_27@^_^@IMAGE_ID=38@^_^@READONLY=NO@^_^@SAVE=NO@^_^@SOURCE=/home/cloud/opennebula/var//a71842893956bc4c4dd0fff52c36cf294295ec7f@^_^@TARGET=hd@^_^@TYPE=DISK
76|DISK|1|CLONE=YES@^_^@DISK_ID=27@^_^@IMAGE=DB_28@^_^@IMAGE_ID=39@^_^@READONLY=NO@^_^@SAVE=NO@^_^@SOURCE=/home/cloud/opennebula/var//b5a8076fcc6bd1dc30c37fda7e156f09ff35637f@^_^@TARGET=hd�@^_^@TYPE=DISK