I apologise if this is not the correct list for the following question. We are looking at running a trial, replacing 2 UFS based fileservers with a couple of xVM virtuals. One server exports a 200G filesystem and the other a 100G filesystem. The new system will be based on an X4150 with 8G RAM and 876G disk configured as 400G with hardware RAID10. So the questions are, for optimal performance, should I use UFS or ZFS, which I have no experience of yet, for the underlying disk format should the filesystem to be exported be sized in to the initial build of the domU, i.e. one domU of 250G and one of 150G, or should I build 2 domUs of about 10G and mount disk slices from the underlying hardware? TIA for any help/pointers John -- John Landamore School of Mathematics & Computer Science University of Leicester University Road, LEICESTER, LE1 7RH J.Landamore@mcs.le.ac.uk Phone: +44 (0)116 2523410 Fax: +44 (0)116 2523604