- The
unRaid system uses one parity drive to protect the whole array.
- The parity drive only need to be as big as the biggest data drive you have
- Unraid allows using of ANY hdd combination. Unlike any RAID setup, you can mix and match, and toss any old hdd into the array.
- One usb stick is needed to store the OS
- Free OS allows 2 data drive, 1 cache drive, and 1 parity drive. Paid license like the one I got support over 20 drives
- If the parity drive fails, all you need to do is replace the parity drive and rebuild parity
- If one data drive fails, the array will fail to run and it will indicate which drive failed in the management console. Replace the drive and the array will rebuild the data
- If 2 data drive fail, you lose both the data drive
- If one data drive fails and the parity drive fail as well, you lose the all data in the failed hdd.
- The OS allows user based sharing and uses SAMBA. I'd mine set to show certain folders: Movies, TV Series, and etc as read only. No username is needed to access these drives. You can specifically hide certain drives/folders. It's SAMBA so you can pretty much do anything if you have knowledge in Linux.
- Write speed is capped at 25MB/s due to the parity drive. With the parity drive disabled you can write at the hdd's max speed. Read speed is not affected by the parity drive.
- A cache disk can be used to aid transfer speed. You can toss the files you wanted to transfer into the cache disk. Unraid will then move the data in the cache disk at a predertemined schedule set by you. However, the cache disk is just a regular drive so if that drive fails before the data is copied over the the array you will lose the data.
- A high current single rail PSU is required if you plan to power a ton of hdd
- Hdds are spun down at a predetermined time to save power. Mine is set to 5mins
- You can put unraid to sleep and use magic packet to wake the system up if required
- Unraid doesn't need much resources or power unless you plan to run a ton of addons. A low power Celeron 420/430 is the best processor to use (used to use one but I replaced it with my old e8400)
- unRaid can utilize APC powerchute to shut down the Pc. My unraid is connected to my APC UPS which has a Network Management Card add on whereby I could have the UPS trigger all PCs connected to the network and the UPS to shut off at the same time.
My unRaid: (all pictures taken when I was still in Canada)







Everything bought from Newegg and NCIX. The server actualls has 16gb of rams lol. I decided to fully load up the whole thing so I know there is no room for me to upgrade in the future. It would be used as-is for many many years to come.
There are many different solutions but I decided to go with this route. There is a specific thread on AVSforum about unRaid. You can use any old pc to build the system. However, if you know where to get rack mount casing in msia, please inform me as I'm looking to get another 2U casing to build a CCTV server
This post has been edited by AlamakLor: May 28 2011, 05:57 PM