I have begun the moving process to switch from my old Windows XP USB Raid5 to FreeNAS. I must say I highly recommend FreeNAS. You can access it at
http://www.freenas.org and download it. Installation takes around 32 MB and it can be installed to a USB flash drive (freeing up an IDE/SATA channel) or any hard drive. After installing, remove the CD, reboot, and hopefully your computer will boot to the new installation. At that point, all you really need to do is setup your LAN IP which basically consists of pushing a number (I think it's 2) and then 'y' to use DHCP. Then, you'll get an IP address. Now go to another computer and enter that IP.
The Web GUI is quite impressive. First, you must add your hard disks in the Web GUI to allow them to be formatted. After that, you can format them with UFS or a few other common file systems but UFS is the preferred. You can also setup RAID0, RAID1, or RAID5 all in the webGUI, completely software based. I currently have my new RAID5 regenerating. You aren't supposed to format the array until regeneration is complete. Also, since it is somewhat a "beta," be aware of rules and instructions because some actions are not prohibited and they could create problems. Also, with beta software and any NAS at all, backup!!!
My case holds 10 hard drives and I plan on building a bracket to hold the boot HDD (I couldn't get USB booting working even though my mobo supports it). I may also add a few more drives (160GB's) as an onsite backup option for the most important data. I did run a quick test a few days ago with smaller drives and after removing a hdd, I was still able to access the array. I did not try replacing the drive again.
With regenerating, I have been keeping records and it looks to be running at a little under half a GB per minute. I am predicting it will be finished 12 hours from now.
For everyone who has tons of media, this may be a great option. The reason I'm using my 2.4GHz P4 and nicest case is because it holds the most drives with breathing space and lots of circulation. Another case I considered keeps the drives almost touching eachother--they would get way too hot. I also was having trouble in the beginning. I advise not changing the auto power off, power management, or noise settings. I set the drives to power off after 20 minutes and strangely enough, when I turned on FreeNAS, the drives spun up and right as FreeNAS was about finished booting, all 10 drives shut off with about a 1 second gap between each (it sounded cool, lol). But then it said drives were disconnected!! Just leave it to always on and avoid that potential issue.
Take an old PC (with at least 96MB of memory) and throw in a few drives. I like RAID5 for redundancy. From my limited tests, write speeds seemed decent. When everything is finished tonight, I'll be moving lots of data back to the array and can post on the speeds. The WebGUI has a really nice graph feature that updates live, showing network usage and CPU usage.
There are currently little or no permission features so only use this on a trusted network. It seems nice to have one box with all my data in it. Compared to the USB solution, now all I need is one power cord and one network cable...compared to that + 5 USB power supplies, 5 USB cables, a hub, lol...just a mess. Now it's all inside the box.
Be careful with the SATA cards because FreeBSD (FreeNAS) has limited support. A 2-port card I have is not supported but the 2 4-port Addonics cards I both ($45 each) have been working so far. I'll have to wait until I start actually writing to the array before I can be sure they will work. I also had to buy 10 SATA cables for about $6 each and they are quite long...I'm thinking 39" but that is helpful because the top drive uses a lot of that distance.
I also purchased 4 adapters to put the hdd's in the regular, large bays. They were about $20 alltogether. Finally, 2-4 power Y-splitters because my 400W power supply only has 7 connectors but I need 11 (10 drives + 1 boot drive). Now I have 10 unused USB enclosures (the My Book's). I almost wonder if I could sell them?
This is a great piece of free software to really put together a great NAS. Enjoy!