G+_Talky Posted June 20, 2014 Share Posted June 20, 2014 Hey Padre,I like to ask you which RAID is the best.I've seen videos about it but I still don't know how to pick the right one.Please help me .Or if anyone has some tips please share them Link to comment Share on other sites More sharing options...
G+_Taylor Graham Posted June 20, 2014 Share Posted June 20, 2014 Raid-Z2 or Z3 :D or RAID10 if you really need hardware RAID. Link to comment Share on other sites More sharing options...
G+_Talky Posted June 20, 2014 Author Share Posted June 20, 2014 Thanks : ) Link to comment Share on other sites More sharing options...
G+_Pablo Oria Posted June 20, 2014 Share Posted June 20, 2014 Depends on what you want to do with the raid, and cost. They all have a cost involved. For normal file storage, raid 5 for single drive failure, or 6 for dual drive failure. If you really care about the data, raid 10, but for more cases A raid 1 is plenty (single drive failure). Raid 5 typically will give you a good balance of speed and redundancy. Always hardware raid. Software raid uses to much system resources, and they are not that good really. Link to comment Share on other sites More sharing options...
G+_Talky Posted June 20, 2014 Author Share Posted June 20, 2014 So what you are telling me is if i care about the files i shoud use raid 10 Link to comment Share on other sites More sharing options...
G+_Pablo Oria Posted June 20, 2014 Share Posted June 20, 2014 Typically you will see raid 10 used on databases and things of that nature. Let's put it this way, at home I use a raid 1 or raid 5 for my pictured. Always backup regardless of what raid you use. There are many ways files can get corrupted regardless of raid level. Most businesses use raid 5 for data and raid 1 for boot. Link to comment Share on other sites More sharing options...
G+_Talky Posted June 20, 2014 Author Share Posted June 20, 2014 I want to be sure that if one drive fails i don't have to scrap the whole system Link to comment Share on other sites More sharing options...
G+_Taylor Graham Posted June 20, 2014 Share Posted June 20, 2014 I'd definitely consider software raid, especially for a NAS. With a hardware RAID, a controller failure can leave you dead in the water. If you can' source the exact same controller, you could loose your array. Software RAID could also save you from buying an expensive controller, depending on how many disks you're using. Software arrays definitely have their place. If your disks are larger than 1TB, you want a technology that can handle the failure of at least two drives. RAID 5 is pretty much useless nowadays. The process of rebuilding the array after a drive failure has a high probability of killing one of the two remaining drives, leaving you with a dead array. Raid 1 is also dangerous, as 1 dying drive will sometimes cause errors in both drives, leading to a bunk array. Link to comment Share on other sites More sharing options...
G+_Pablo Oria Posted June 20, 2014 Share Posted June 20, 2014 Both raid 1 or 5 allow one drive failure. Link to comment Share on other sites More sharing options...
G+_Taylor Graham Posted June 20, 2014 Share Posted June 20, 2014 Why you shouldn't use raid 1/5 if you care about the data: http://www.zdnet.com/blog/storage/why-raid-5-stops-working-in-2009/162 Link to comment Share on other sites More sharing options...
G+_Taylor Graham Posted June 20, 2014 Share Posted June 20, 2014 I'm not saying you'll definitely loose your array during a rebuild with RAID 1/5, but its possible. I just experienced a drive failure on my NAS (raid-z2), and I wouldn't have wanted to take that chance. You can weigh the costs/benefits for yourself. If your data isn't that important to you, its a different story. But drives are cheap, why take chances? Link to comment Share on other sites More sharing options...
G+_Pablo Oria Posted June 20, 2014 Share Posted June 20, 2014 Correct. Raid 6 gives you 2 drive redundancy, if you are willing to pay for an extra drive with no gain in usable space. Also not all controllers support it. Typically 2 simultaneous drive failures are hard to see (but not impossible), and if you have alerts set to notify you when the drive fails and replace it within a reasonable time you are probably ok. Keep in mind this does mot replace a backup. Controllers are hw and can fail 2, so you have other points of failure. Link to comment Share on other sites More sharing options...
G+_Pablo Oria Posted June 20, 2014 Share Posted June 20, 2014 It also depends on what you are using to do the raid as well. Enterprise use hw raid, but they are also paying a lot for those hw controllers. It would help to know what are you looking at using for the raid. Link to comment Share on other sites More sharing options...
G+_Talky Posted June 20, 2014 Author Share Posted June 20, 2014 Raid is a scary topic,it seems like every raid has its follower,what i understood is that the choice is between raid 6 and zfs.2 simultaneous drive failures will possibly not be a problom.I have hard disks that have been working since 2008 and they still work but they were the only droves in they're system and i dont know how long will they work in a 4 drive array Link to comment Share on other sites More sharing options...
G+_Talky Posted June 20, 2014 Author Share Posted June 20, 2014 And thanks for the support Link to comment Share on other sites More sharing options...
G+_Jerry McMurphy Posted July 1, 2014 Share Posted July 1, 2014 I use RAID 5. I like the balance of redundancy and speed. I do nightly local backups, sync some critical files to Dropbox, and have rotating offsite backups. 3 backups, 2 forms of media, and 1 offsite... 3, 2, 1! Link to comment Share on other sites More sharing options...
Recommended Posts