VMware Image backup fails with had channel error (4045960)

Date SEP 09
Plugin version: VMware 1.1


Symptoms:
Background 2009/09/29 10:10:33 5116 Media BKP-ADM Sent Plugin space left estimate of 253812 Mb
Information 2009/09/29 10:10:33 5116 Data Plugin BKP-ADM Backup virtual machine 'PRX-ADM-DEV' uuid '5037a812-79c6-f2b7-bcea-de74ae403cf9'
Error 2009/09/29 10:10:38 5116 Media BKP-ADM BKP-ADM 2-0.3.0 (IBM ULT3580-TD4): had channel error

Binary log Sub text:

NET :5576 38 0 91038 Wait 0 milliseconds for data
NET :5576 40 0 91038 3 = NetSelect(0012F75C, 021B4080, 021E4E90) 0
MESSAGE :5576 227 0 91038 Updated receive list
MESSAGE :5576 58 0 91038 FALSE = MsgReceive(0012F874, 00758B38)
DATA :5576 96 0 91038 Other process has died unexpectedly
MEDWRITE:5576 190 1 91038 Device write data in: FAILURE
DEVMGR :5576 812 0 91038 DevMgrChannelError() - FALSE = bChannelError, FALSE = bMediaError, FALSE = bAbort, FALSE = bStop

Trace was taken on the VCB proxy server and we do not see any process die.

Created new job and this ran correctly
We found that the customer had created new virtual system with the same name but with 64bit OS rather than 32 bit OS.

Reasons
When we backup an image we use a VMware uuid to identify the image. So when the new image was created the uuid changed even though the system name had stayed the same.

If an Image is recreated a new backup selection set is required.
The old selection set should be deleted and we can say if an image is deleted permanently the backup job should be deleted.