Why is it that the chassis is the hardest component to pick when looking for a storage solution that contains between 24-45 disks? I've had all the other components picked out for several months now, but it's very hard to settle on what chassis to use, how many disks it should have, should it be backplane or direct connect, etc. I have a 20TB home backup storage server RAIDZ1, and need to upgrade urgently, hemorrhaging data. I've mulled over the following choices: NORCO RPC-4224 (24 disks) Supermicro 24/36/44/45 disk chassis in server or JBOD configuration Storinator (backblaze pod) 30/45 disks with Rocket 750 card Some of the problems that I can't solve: -price point is a pretty big factor, and it's hard to argue against reliability and safety but still -number of disks, not sure I would need 45 disks, might not fill up all of them by the time SSD technology or other storage technologies start becoming affordable at large scales, by the next upgrade I'd be using non-SATA3 drives and this chassis would not work... -power, paying for electricity is a significant expense per month ~$40, JBOD or server, cannot run multiple servers with multiple storage pools due to $$ and split archives -direct attach vs backplane, direct seems more convenient and safer, no backplane to deal with but harder to work with if a cable goes wrong. NORCO backplane might not be very reliable, Supermicro backplane should be reliable especially with the redundant backplane components but expensive... I'm hoping to get 8TB WD Reds, 8-12 hdds for the first round to start, should be sufficient for a few years. I also have 6 4TB disks in another server that might make sense to migrate into the new server to save power, or should I use existing server to control a JBOD, that would save ~$800 worth of various components.