(2012-05-01 16:38)mattchapman Wrote:(2012-05-01 03:51)Diggs Wrote: The advantage of Unraid or any RAID setup is redundancy. I have a lot of time invested in my media library and if a drive fails, then I get to do all the work over again to get it back onto a drive from either BR or DVD. With Unraid, if I lose that drive then I pull it from the server, drop a new one in and it will rebuild the failed drive. While the rebuild of the failed drive isn't quick, it is certainly simple and quicker than repopulated the drive by ripping the data again. The reason I chose to go with Unraid over a traditional raid array was the way it writes data to the drives. There is no stripe set across all the drives, so if I lose 2 drives I can still read the data off the remaining drives. If I went with a RAID 5 setup and lost 2 drives, then all the data is gone.
Raid is not a backup, you need a duplicate copy off site in order to achieve a full on backup solution, but it does add a big layer of security for your data where using drives on a windows 7 setup with no RAID offers no redundancy at all.
I thought UnRaid can only recover from a single drive loss which it then rebuilds using the Parity drive.?
That is correct, it can only rebuild one drive from the parity drive. However, if you should lose 2 drives the other drives are still readable unlike having a traditional RAID 5 setup where you need a functioning array to read any data from any of the drives. My setup is using 5 drives currently and will be expanded to 6 in the near future. If 2 of the drives should fail, one being the parity drive, then the 4 drives of data are still usable. If I lost 2 data drives, then I should still be able to read the data from the remaining 2 drives and if I remember correctly, the parity drive would still rebuild one of the two lost drives. RAID 5 can't do that, at least that is my understanding. Someone correct me if that is not correct.
(2012-05-02 02:04)ivseenbetter Wrote:(2012-05-01 03:51)Diggs Wrote: The advantage of Unraid or any RAID setup is redundancy. I have a lot of time invested in my media library and if a drive fails, then I get to do all the work over again to get it back onto a drive from either BR or DVD. With Unraid, if I lose that drive then I pull it from the server, drop a new one in and it will rebuild the failed drive. While the rebuild of the failed drive isn't quick, it is certainly simple and quicker than repopulated the drive by ripping the data again. The reason I chose to go with Unraid over a traditional raid array was the way it writes data to the drives. There is no stripe set across all the drives, so if I lose 2 drives I can still read the data off the remaining drives. If I went with a RAID 5 setup and lost 2 drives, then all the data is gone.
Raid is not a backup, you need a duplicate copy off site in order to achieve a full on backup solution, but it does add a big layer of security for your data where using drives on a windows 7 setup with no RAID offers no redundancy at all.
I see. Good info. Thanks.
I keep hoping I can find info that proves unraid is a "green" solution but assume it would use the same amount of wattage as the win 7 box if I am using the same hardware.
Unraid is simply an operating system. While I haven't played around with the energy settings, I think you will find the hardware used will make a larger impact on the amount of power used. I am pretty sure you can adjust the time before the array spins down, which is likely the biggest consumer of power in my server. I just left mine at the default settings, and have only had it running for a few weeks now. It's great having one share on XBMC for movies and one for TV instead of having them spread across multiple locations. I just returned from vacation and this weekend I hope to install MySQL onto the Unraid server so all my XBMC HTPCs will have one database to flow from. Watched and unwatched and resume points should be the same throughout the house after that, as well as the actual settings of XBMC so each system has the same skin and layout. Change to one, changes all of them.

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