Thanks for your reply.

While I appreciate this is possible I am VERY concerned that the Windows XP box we have running Veeam might, in an extreme case, write to the VMFS ISCSI LUN in some way (for example writing a disk signature).

Hence my need, as suggested in the Veeam setup guide, to mount the LUN read only on our Veeam backup machine and read/write on our ESXi box.

What are your thoughts?

Best regards

TFZ