I'm trying to get RSV-S8 working with Citrix XenServer 5 update 3 (which I believe runs CentOS 5.something). I have the Rosewill card that comes with it in there (sil3132 based). It's seeing the card, and seeing all my drives. I fdisk the drives and I can create the partitions, but I am unable to set up either software raid or create filesystems. I keep getting errors saying that the volumes are in use (although they do not appear to be mounted anywhere). # mkfs.ext3 /dev/sdc1 mke2fs 1.39 (29-May-2006) /dev/sdc1 is apparently in use by the system; will not make a filesystem here! # mdadm --create /dev/md0 --level=0 --raid-devices=2 /dev/sdb1 /dev/sdc1 mdadm: Cannot open /dev/sdb1: Device or resource busy mdadm: Cannot open /dev/sdc1: Device or resource busy mdadm: create aborted Am I doing something wrong or is it possibly an issue with the driver? I had no problems using this under windows. Russ