Samsung MZ-7KM480 -O [--over-provision]

Samsung SSD Magician DC 25

-O [--over-provision]

Set the SSD’s overprovision (= OP) area size to the given value.

Arguments:	-q [--query]: Displays OP information of the selected SSD.
	-s [--set]: Sets the OP value either in MB or GB or % of total disk space.
	-c [--clear]: Clears the current OP value on the last partition of the disk.
Used with:	--disk [or] -d
	magician --disk 1 --over-provision --query
	magician --disk 1 --over-provision --set 1024MB
	magician --disk 1 --over-provision --set 4GB
	magician --disk 1 --over-provision --set 10%
	magician --disk 1 --over-provision --set
Usage:	magician --disk 1 --over-provision --clear
	[or]
	magician -d 1 -O -q
	magician -d 1 -O -s 1024MB
	magician -d 1 -O -s 4GB
	magician -d 1 -O -s 10%
	magician -d 1 -O -s
	magician -d 1 -O -c

※Note: If no argument is given for --set option, the application will perform Over-Provisioning with default value, 10%. -O short switch can also be used for –over-provision. Short switches for --query, --set and --clear are -q, -s and -c respectively.

The values (1024MB, 4GB and 10%) used above are for illustration purpose only.

Overprovisioning on Windows Example

Display value	Description	Calculation
Current OP	Capacity of total current OP area, each partition	Unallocated space size
	reserved by file system. User can only modify
		of selected disk
	the reserved area of the last partition
		(247 GB)
Recommended OP	Capacity of recommended OP area, 10% of	447 GB * 10% = 48
	device size
		GB
	Minimum value of either:	Min(447 GB * 50% = 228
Maximum OP	- 50% of total capacity
		GB, 247 GB + shrinkable)
	- Maximum shrinkable area
		=> 228GB
	*Increasing OP value greater than 50% of
	the SSD density will not have further
	performance benefit beyond the 50%.
	Therefore, Magician tool supports allocating
	the OP only up to 50% of the SSD.