>> I think ext3 is a bit slow on so big LUNS, try xfs or similar? > > there is no official support for xfs in RHEL5, so that is not an option. > Besides, I'm talking about a drop of >150mb/s to ~10mb/s read performance > when cracking the 2.2T size. This is clearly not in the ext3 (or FS for > that matter) magnitude of performance issues. Also, numbers stay the same > when dd'ing on the raw device (LUN). > > -Jens Hello Jens, I always used LVM to make LUNs from a NetApp SAN available to CentOS/RHEL 4/5 systems. Administrating several systems with multiple LUNs of +2.2TB and not seeing such a negative performance impact. Filesystem used is ext3. Regards Alexander