Last Sync: 2022-07-10 16:00:04

Operating_Systems/Disks.md

@@ -151,12 +151,11 @@ $ fdisk -l
 ```bash
 umount /dev/sda1
 umount /dev/sda2
-
 ```
 #### 2. Deleting the existing partitions
 ```bash
 # Load the disk into fdisk
-sudo fdisk /dev/sda
+$ sudo fdisk /dev/sda
 
 # Select delete and run for each partition
 Command (m for help): d
@@ -168,7 +167,7 @@ Command (m for help): d
 Selected partition 2
 Partition 2 has been deleted.
 
-# Verify deletion with p command
+# Verify deletion with p(rint) command
 Command (m for help): p
 Disk /dev/sda: 465.74 GiB, 500079525888 bytes, 976717824 sectors
 Disk model: My Passport 071A
@@ -178,10 +177,75 @@ I/O size (minimum/optimal): 512 bytes / 512 bytes
 Disklabel type: gpt
 Disk identifier: 9993F1BB-626C-485F-8542-3CC73BB40953
 
-# Write the changes to disk with w
+# Write the changes to disk with w(rite)
+w
 
+# Check execution:
+$ lsblk
+NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
+sda           8:0    0 465.7G  0 disk 
+```
+So now the disk has no partitions, just the physical disk space and no mountpoints. We are ready to re-partition.
+
+#### 3.  Re-partition the disk
+We are going to create a GPT partition table
+
+```bash
+$ sudo fdisk /dev/sda
+Command (m for help): g
+Created a new GPT disklabel (GUID: E316B1A9-6F73-FB41-8CBB-FA4E3C448F2B).
+
+Command (m for help): n
+Partition number (1-128, default 1): 
+First sector (2048-976717790, default 2048):
+
+# Just press enter here
+
+# The last sector is where we put the actual size we want for the partition
+Last sector, +/-sectors or +/-size{K,M,G,T,P} (2048-976717790, default 976715775): +100G
+Created a new partition 1 of type 'Linux filesystem' and of size 100 GiB.
+
+# For the second and final partition, we follow the same steps but don't add a partition size, since it will default to what is left. 
+
+Command (m for help): n
+Partition number (2-128, default 2): 
+First sector (209717248-976717790, default 209717248): 
+Last sector, +/-sectors or +/-size{K,M,G,T,P} (209717248-976717790, default 976715775): 
+
+Created a new partition 2 of type 'Linux filesystem' and of size 365.7 GiB.
+
+# Check the partitions with p(rint)
+Command (m for help): p
+Disk /dev/sda: 465.74 GiB, 500079525888 bytes, 976717824 sectors
+Disk model: My Passport 071A
+Units: sectors of 1 * 512 = 512 bytes
+Sector size (logical/physical): 512 bytes / 512 bytes
+I/O size (minimum/optimal): 512 bytes / 512 bytes
+Disklabel type: gpt
+Disk identifier: 92739978-F7D2-5042-9758-C1429B5C8E11
+
+Device         Start       End   Sectors   Size Type
+/dev/sda1       2048 209717247 209715200   100G Linux filesystem
+/dev/sda2  209717248 976715775 766998528 365.7G Linux filesystem
+
+# Then write with w
+Command (m for help): w
+The partition table has been altered.
+Calling ioctl() to re-read partition table.
+Syncing disks.
 ```
 
+We can now confirm out new partitions:
+
+```bash
+$ lsblk
+NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
+sda           8:0    0 465.7G  0 disk 
+├─sda1        8:1    0   100G  0 part 
+└─sda2        8:2    0 365.7G  0 part 
+```
+
+> Whilst we have created our partitions we cannot yet mount them. This is because we have not yet set up a filesystem on the partitions. This is the next step. 
 
 
 ## BIOS and UEFI 
@@ -198,8 +262,3 @@ Even though most modern computers use UEFI, it may still be referred to as BIOS
 ## File systems
 
 File systems are what the computer relies on to ascertain the location and positioning of files on the disk. In Linux it is customary to use FAT-32 for the boot partition and ext-4 for the extended partition. In other operating systems you would do the same but most likely use NFTS for the extended partition.
-
-
-## Stuff to add
-
-- The lsblk command