mdadm:tldr:f8d12

The given command is used to create a RAID array using the mdadm tool on a Linux system with sudo privileges. Let's break down the components and their meanings:

• sudo: It is a command that allows the user to run programs with the security privileges of another user, usually the superuser (root).
• mdadm: It is a command-line utility used to manage MD (Multiple Device) devices, also known as software RAID arrays, on Linux systems.
• --create: This flag is used to inform mdadm that we want to create a new RAID array.
• ${-dev-md-MyRAID}: This is a placeholder representing the desired name of the RAID device. You need to replace ${-dev-md-MyRAID} with the name you want to give to your RAID device.
• --level ${raid_level}: This flag specifies the RAID level to be used. You need to replace ${raid_level} with the desired RAID level (e.g., 0, 1, 5, etc.).
• --raid-devices ${number_of_disks}: This flag indicates the number of disks involved in the RAID array. You need to replace ${number_of_disks} with the actual number of disks you want to use.
• ${-dev-sdXN}: This is a placeholder representing the device names of the disks to be used in the RAID array. You need to replace ${-dev-sdXN} with the actual names of the disks you want to use (e.g., /dev/sda, /dev/sdb, etc.). X in sdXN represents the drive letter, and N denotes the partition number.

To use the command correctly, you should replace the placeholders with appropriate values based on your requirements and disk configuration.