1 00:00:00,000 --> 00:00:12,480 In this video, I'll show you how to work with extended and logical partitions in an MBR 2 00:00:12,480 --> 00:00:13,480 environment. 3 00:00:13,480 --> 00:00:18,320 So let me explain primary extended and logical partitions which are used in MBR. 4 00:00:18,320 --> 00:00:19,320 It's easy. 5 00:00:19,320 --> 00:00:24,840 If this is your hard disk, not a perfect circle, but that doesn't matter, in your hard disk 6 00:00:24,840 --> 00:00:27,600 you create different partitions. 7 00:00:27,600 --> 00:00:32,160 So in MBR, you are placed for four partitions only. 8 00:00:32,160 --> 00:00:37,480 So if each of these pizza pies is a partition, well, you are placed for one more. 9 00:00:37,480 --> 00:00:41,680 But what happens if you want to create more than just four partitions? 10 00:00:41,680 --> 00:00:46,919 Well, in MBR, due to the limited disk space, you don't have space for it. 11 00:00:46,919 --> 00:00:51,119 So what you are going to do, you treat one of them as an extended partition, and within 12 00:00:51,119 --> 00:00:56,160 the extended partition, you are going to add your logical partitions. 13 00:00:56,160 --> 00:01:00,439 And that makes that you can get beyond the limitation of four partitions only. 14 00:01:00,439 --> 00:01:05,199 Okay, at any time, if you start working with partitions, it's a good idea to start with 15 00:01:05,199 --> 00:01:08,199 LSBLK to list your block devices. 16 00:01:08,199 --> 00:01:17,800 I'm going to use fdisk on dev nvme 0 n1, and I like to use p. 17 00:01:17,800 --> 00:01:21,160 You should always use p so that you know what you are doing. 18 00:01:21,160 --> 00:01:24,160 Next I'm using n to create a new partition. 19 00:01:24,160 --> 00:01:29,879 Normally, you would always use all your primary partitions before you start using an extended 20 00:01:29,879 --> 00:01:30,879 partition. 21 00:01:30,879 --> 00:01:34,800 But I'm going directly for the extended partition. 22 00:01:34,800 --> 00:01:40,360 The reason that normally you first consume all of your primary partitions is that primary 23 00:01:40,360 --> 00:01:42,879 partitions are direct partitions. 24 00:01:42,879 --> 00:01:47,760 And if ever you need to do troubleshooting on disk, it is much easier if you can troubleshoot 25 00:01:47,760 --> 00:01:49,680 primary partitions. 26 00:01:49,680 --> 00:01:54,519 Then by the time you start using your extended partition, you address all of the remaining 27 00:01:54,519 --> 00:01:58,080 disk space in your extended partition. 28 00:01:58,080 --> 00:02:04,000 So here I'm going to add partition number two as the extended partition. 29 00:02:04,000 --> 00:02:06,879 It's asking for the first sector, I'm pressing enter. 30 00:02:06,879 --> 00:02:10,440 And then it's asking for the last sector, and I'm pressing enter again. 31 00:02:10,440 --> 00:02:16,520 Particularly, if this is partition number four that you create in MBR, after creating 32 00:02:17,039 --> 00:02:20,800 partition number four, there's no more place in your partition table. 33 00:02:20,800 --> 00:02:24,080 And that is why I'm pressing enter on the second question. 34 00:02:24,080 --> 00:02:26,559 So now I have my extended partition. 35 00:02:26,559 --> 00:02:34,119 And you can see the extended partition ranges from 2099200 up to 41943039. 36 00:02:34,119 --> 00:02:36,639 Good. 37 00:02:36,639 --> 00:02:40,119 Next I'm going to use n to create a new partition. 38 00:02:40,119 --> 00:02:44,559 And this time it is telling me all space for primary partitions is in use. 39 00:02:44,600 --> 00:02:48,160 And it's adding logical partition five. 40 00:02:48,160 --> 00:02:55,600 If you have no more space in your MBR partition table, you start using your logical partition. 41 00:02:55,600 --> 00:02:59,839 And the first logical partition is always partition number five. 42 00:02:59,839 --> 00:03:05,199 So I am going to press enter on the first sector, which is within the range of the extended 43 00:03:05,199 --> 00:03:07,720 partition, as we discussed before. 44 00:03:07,720 --> 00:03:15,320 Next, I'm going to use last sector plus one uppercase G to make it a one gig partition. 45 00:03:15,320 --> 00:03:19,839 So logical partitions are always created in order. 46 00:03:19,839 --> 00:03:25,720 And here also goes that this order might change if you delete a logical partition, for instance. 47 00:03:25,720 --> 00:03:27,839 But for now, we are not going to do that. 48 00:03:27,839 --> 00:03:33,240 I'm just showing you the current partitioning, where we have NVMe 0 and 1P2. 49 00:03:33,240 --> 00:03:39,320 And you can see that NVMe 0 and 1P5 falls within the range of the logical partition. 50 00:03:39,320 --> 00:03:45,240 So if that is what you wanted, and that is what I want right here, let's do W to write. 51 00:03:45,240 --> 00:03:50,039 And let's use LSBLK to verify. 52 00:03:50,039 --> 00:03:53,039 So, so far, we have only created partitions. 53 00:03:53,039 --> 00:03:56,559 The next step would be to create a file system on top of it. 54 00:03:56,559 --> 00:04:00,559 Because right now, the partitions are just a reservation of disk space. 55 00:04:00,559 --> 00:04:03,119 They are not usable at all. 56 00:04:03,119 --> 00:04:07,839 So in one of the next videos, you'll learn how to create file systems on top of them. 57 00:04:07,839 --> 00:04:12,160 But before that, we'll talk about GPT partitions in the next video.