a hardware based raid 5 is your best bet, it joins the storage sizes of all but one of the disks and can suffer a single disk failuer Jacob Mansfield Programmer <div class="gmail_quote">On 13 October 2010 20:24, Lamp Zy <<a href="mailto:lampzy@gmail.com">lampzy@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> Hi, What I'm looking for is suggestions, best practices, success stories or anything that will point me in the right direction. I realize that our requirements are the same as 90% of the companies out there but the "Redundancy" part is where I stumbled upon. We are hosting user images that are less then 1MB in size. Images are small and the processing we are doing on them is not I/O intensive so there is no need for high performance hardware or high network speeds. File systems are exported to the application servers over NFS. All we need is a reliable storage solution that works over NFS (NAS). It is expected that our storage needs will grow to about 50+ TB within 5 years. One of the requirements is redundancy. If one storage unit fails then another should pick up with no interruption. Also it needs to be scalable. At this point we can not invest in all 50TB storage so we need to be able to add more storage easily as needed. We are about to go with gluster (<a href="http://gluster.org" target="_blank">gluster.org</a>). It is a Data Cluster solution where one can add systems with DAS in pairs. Each pair can be configured to simulate RAID1 (if I understand correctly). Looks good... on paper at least. My concerns are that they use their own glusterFS which probably relies on ext3 or zfs. Also you can use NFS but it's recommended to use their client daemon instead and so on. Any recommendation about a solution or suggestions are highly appreciated. Thanks Peter -- ubuntu-users mailing list <a href="mailto:ubuntu-users@lists.ubuntu.com">ubuntu-users@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-users" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-users</a> </blockquote></div>