VIBE is also an option for those who aren't ready to take 
the plunge to SMVI.
 
VIBE is available if 
you have an active NOW account under downloads>tool 
chest.
Hi Raj
Yes, there are many people using SnapMirror with ESX 
datastores, both NFS and VMFS LUNs (both iSCSI and FCP).
 
As far as crash consistency, you can get consistent backup 
using SnapManager for Virtual Infrastructure in conjunction with VMware 
Tools VSS provider (ESX 3.5 u2 or later) for those applications that are VSS 
compatible.  For those that aren't, or have a scriptable hot 
backup mode, you can call scripts from VMware Tools.  Pre and post 
scripts are documented in the Virtual Machine Backup Guide (http://www.vmware.com/pdf/vi3_35/esx_3/r35u2/vi3_35_25_u2_vm_backup.pdf). 
 
Here are some links for SMVI:
 
Share 
and enjoy!
 
Peter
Hi,
Anyone used SnapMirror successfully with ESX LUN's 
?
I realise it will only be a crash-consistent copy and I have to enable 
LUN re-signaturing for ESX to pick it up but this seems like a handy way for me 
to backup a few DMZ VM's on a LUN (on a seperate secured iSCSI vlan) to another 
LUN on the same SAN.
Cheers,
Raj.