Thanks for all your help, I have tried many things none of which have worked I will wait for your the engineers to look at it. One question when creating a FC volume must it be initialized or is this only relevant to iscsi volumes. I have noticed that when creating new iscsi volumes the performance for clients already connected to iscsi volumes decreases substantially while the new volume is initialized.

E.g using iometer we are getting a combined read write of 145MB/s but when running the same test while creating a new iscsi volume the performace drops to 15MB/s. Just thought I would share my experiance.

Gavin