Just learning all about the fun of a NAS box
I found reviews and info on NAS here:
http://www.smallnetbuilder.com/
& they have performance tables here:
http://www.smallnetbuilder.com/component/option,com_nas/Itemid,190/
they have some articles on choosing a NAS here:
http://www.smallnetbuilder.com/content/blogcategory/120/230/
the latest short guide mainly tells you what all the options are, but gives a few clues on the features that matter, but sadly does not give a table of prices and features and ratings, although they have some suggestions at the end.
The NAS I recently bought is really for the new business that we're setting up at home, and data security & backup was a very high priority. Smallnetbuilder has some interesting ideas on raid and backup (
http://www.smallnetbuilder.com/content/view/30060/230/ ) basically along the lines of you're safer backing up than raiding. The forums at smallnetbuilder pointed me towards the Netgear ReadyNAS range as the best backup feature set and very good reliability. The Netgear ReadyNAS units can do backup from a PC shared drive (pulled FROM the NAS), to a PC shared drive, to another NAS, and unusually they can do it on a short schedule (set in hours, not days), full and incremental are available, archive bit or date stamped. There is also a PC utility included which is a shadow system that copies from the PC to the NAS live, on the fly, and can be set to not overwrite replaced files but keeps all previous versions safe on the NAS (sounds great but but I'm not sure about the shadow software's reliability yet, it may just not like handling locked PC system files, I need to try it on some data only directories)
Unit I've got is a ReadyNAS Duo (
http://www.scan.co.uk/Products/Netgear-RND2000-100-READYNAS-DUO-2-Bay-Desktop-NAS-(Empty-Case)) , bought empty but had an offer for a free 500GB drive(now in a new PC), and I've fitted two 1TB drives at a fraction of the cost of buying a ready built drive. They're installed as raid 1. I'm in the process of setting up the network, new PC etc, and the NAS is being set to automatically backup everything on itself to a dedicated 1TB drive in one of the PCs, and I've got two seperate 1TB USB drives to take manually triggered backups in rotation and keep in the fire safe (yes, its belt, braces and piece of string but the business is embroidery design and the design files produced are rather important)
a few points I have discovered so far.
1 - raid NAS is not safe without a UPS. It does not like sudden power outage, it goes into a sulk and checks and rebuilds the raid array after it is powered back on. Get a UPS with USB comms to do a controlled shutdown if the power goes, small UPS units are cheap (<£80). And also set the NAS for journalling, so that it makes sure the data is written, it can go faster by throwing it at the disk and praying, but then the data is not 100% safe.
2 - wired gigabit LAN is a wonderful idea and helps enormously, but you don't get gigabit throughput, its limited by the drive speeds
3 - bits per second is not the same as Bytes per second, watch the numbers quoted
4 - USE APPROVED HARD DRIVES, all NAS have approved drive lists, stick to them if you intend to keep your data. Hard drives are not all equal, some do wierd things. Places like scan.co.uk and overclockers.co.uk quote the part numbers for the drives when you are buying them, just take a bit of care and stick to the approved list for your NAS.