Over Provisioning, Reserved area | Samsung MZ-7KM480Z, MZ-7KM240E

Samsung SSD Magician DC

Over Provisioning

This feature is useful for shrinking or expanding the memory of the given Samsung SSD. User has to give input in size (MB/GB) or percentage to shrink/expand the SSD size. The below given CLI input will perform over provisioning operation on selected disk.

		Reserved area
		Reserved area
User area		(Over provision feature set the
(Data area user can use)		reserved area base on file
		system)

magician --disk 1 --over-provision --query magician --disk 1 --over-provision --set 1024MB magician --disk 1 --over-provision --set 2GB magician --disk 1 --over-provision --set 10% magician --disk 1 --over-provision --clear magician -d 1 -O -q

magician -d 1 -O -s 1024MB magician -d 1 -O -s 2GB magician -d 1 -O -s 10% magician -d 1 -O -c

If no option is followed by either -s or --set switch, then the tool will perform Over-Provision with default value (10%).

magician --disk 1 --over-provision --set or

magician -d 1 -O -s

Note: Short switch -O can also be used for --over-provision. For --query, --set and --clear, short switches -q, -s and -c can be used respectively.

Note: The maximum percentage of over provisioning to be performed on the drive is restricted to 50% of the drive’s physical size. Similarly, the size in MB is also the value equivalent to 50% of the drive’s physical size. The OP will be performed always on the last

partition of the selected SSDs.

Set Max Address

This feature is for setting maximum address of the SSD. The user has to input the number of sectors in decimal format. This feature is designed to set the physical capacity of SSD. This feature is only recommended to be used on the device at its initial set-up stage. In contrast to over-provisioning modifying max address may result in data loss, particularly when the max address is reduced.

This feature will update the disks capacity with user input value, only if it is successful in reading the max address value of the disk. After successful execution, the updated value of the disk can be observed in --list command.

magician --disk 1 --setmax --set 12345678 magician --disk 1 --setmax --read-native-max or

magician -d 1 -M -s 12345678 magician -d 1 -M -r