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Operating_Systems/Disks.md
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@ -146,6 +146,43 @@ $ fdisk -l
(This disk was previously used as a backup disk for MacOS so in addition to the extended partition which has a proprietary file system type (Apple HFS) it has a primary partition which would load the recovery OS. In contrast to my main harddrive this uses the standard SCSI prototcol and thus the partitions are prepended with `sda`.) (This disk was previously used as a backup disk for MacOS so in addition to the extended partition which has a proprietary file system type (Apple HFS) it has a primary partition which would load the recovery OS. In contrast to my main harddrive this uses the standard SCSI prototcol and thus the partitions are prepended with `sda`.)
#### 1. Unmount existing partitions
```bash
umount /dev/sda1
umount /dev/sda2
```
#### 2. Deleting the existing partitions
```bash
# Load the disk into fdisk
sudo fdisk /dev/sda
# Select delete and run for each partition
Command (m for help): d
Partition number (1,2, default 2): 1
Partition 1 has been deleted.
Command (m for help): d
Selected partition 2
Partition 2 has been deleted.
# Verify deletion with p command
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: 9993F1BB-626C-485F-8542-3CC73BB40953
# Write the changes to disk with w
```
## BIOS and UEFI ## BIOS and UEFI