1 00:00:00,160 --> 00:00:05,040 If you want to know about the simple kinds of RAID, RAID zero and RAID one, 2 00:00:03,439 --> 00:00:10,559 we've got a separate video for that. Make sure you click the link here to check it out. This video is about RAID 3 00:00:08,480 --> 00:00:16,560 five and RAID six, which are more practical for professional applications 4 00:00:13,840 --> 00:00:21,279 and less practical for home users. Just like RAID one, RAID 5 is for protecting 5 00:00:19,039 --> 00:00:25,600 your data in the event of a drive failure. It requires at least three 6 00:00:23,600 --> 00:00:30,160 drives to operate with one of the drives being reserved to rebuild the data on 7 00:00:27,519 --> 00:00:33,920 the array if it dies. So if you had say for example six drives, you'd have the 8 00:00:31,840 --> 00:00:37,520 capacity of five drives. Because it stores data on multiple drives, you can 9 00:00:35,600 --> 00:00:41,760 read from it extremely quickly, making it great for archiving large amounts of 10 00:00:39,600 --> 00:00:46,000 data. However, without a complex hardware RAID controller, writing to a 11 00:00:43,760 --> 00:00:49,520 RAID 5 can be much slower. And rebuilding the array once a drive is 12 00:00:47,920 --> 00:00:54,800 failed and you replace it with a new one can be timeconuming. RAID 6 is kind of 13 00:00:52,320 --> 00:00:59,199 like a more durable version of RAID 5. It can survive up to two drive failures 14 00:00:57,039 --> 00:01:03,280 out of the entire array and still be completely rebuilt. That means, however, 15 00:01:01,359 --> 00:01:10,159 that you have to have at least four drives and it is much slower to write 16 00:01:07,360 --> 00:01:14,400 than RAID 5. So, pretty much unless you have a complex hardware RAID controller, 17 00:01:12,400 --> 00:01:17,439 you can't really run RAID 6. When you're running four drives, it's really 18 00:01:15,920 --> 00:01:22,159 impractical compared to something like RAID 10 and is more designed for 19 00:01:19,600 --> 00:01:26,159 professional applications where a large number of drives are built into larger 20 00:01:24,240 --> 00:01:29,840 arrays. If you're watching this, you've probably watched our video on RAID zero 21 00:01:27,680 --> 00:01:34,720 and one already. For consumers, RAID one's fine. If you're running only four 22 00:01:31,600 --> 00:01:37,600 drives, RAID one will give you 6 TB of 23 00:01:34,720 --> 00:01:41,040 usable space using 3 TB drives. RAID 5 gives you a bit more space, but you 24 00:01:39,280 --> 00:01:45,439 write to it much slower, so it can be useful. But RAID 6 gives you only 6 tab 25 00:01:43,520 --> 00:01:49,040 of space, and it's much slower and requires one of these bad boys. The 26 00:01:47,280 --> 00:01:52,720 numbers start to look very different once you move up to an eight drive 27 00:01:50,640 --> 00:01:56,320 configuration. However, RAID one will give you 12 tab of usable space only. 28 00:01:55,040 --> 00:02:01,280 Half of your drives are used for redundancy. RAID 5 gives you 21 29 00:01:59,360 --> 00:02:05,360 terabytes of space and RAID six will give you 18 terabytes of space. Plus the 30 00:02:03,600 --> 00:02:10,520 fact that RAID five can sustain one failure and RAID six can sustain two 31 00:02:07,520 --> 00:02:10,520 failures. 32 00:02:10,560 --> 00:02:16,800 Hey guys, thanks for watching this episode of As Possible on Techquicki. If 33 00:02:15,200 --> 00:02:20,640 you enjoyed it, make sure you subscribe and also don't forget to hit that like 34 00:02:18,480 --> 00:02:24,080 button. It helps us out a lot. Share this video with anyone you think might 35 00:02:22,319 --> 00:02:27,760 benefit from it. And if you have any ideas for future episodes of Fast as 36 00:02:26,239 --> 00:02:31,440 Possible, click the link in the description of the video and leave us a 37 00:02:29,599 --> 00:02:37,280 suggestion. We will make sure to monitor and hopefully you'll see your idea soon. 38 00:02:33,760 --> 00:02:37,280 See you guys again next time.