Samsung MZ-7LM960NE, MZ-7LM1T9NE, MZ-7LM480NE manual Erase, Set Max Address

User Guide SAMSUNG PROPRIETARY

Examples

Erase

Erase feature is designed to remove all user data from a drive permanently. This command will put the drive back to its original out-of-box state. This will initially restore its performance to the highest possible level and the best (lowest number) possible write amplification.

The below given CLI input will perform the erase operation on the selected disk:

DCToolkit --	disk -1 –erase
DCToolkitD --	disk 1:c	--nvme-format-namespace	--user-data-erase
DCToolkitD --	disk 1:c	--nvme-format-namespace	--cryptographic-erase
or

DCToolkit -d 1 –E

DCToolkitD -d 1:c -NF -ue

DCToolkitD -d 1:c -NF –ce

※Note: When the disk is in frozen state, the user has to unplug and plug-in the power cable and restart the erase operation.

Write amplification is an issue that occurs in SSDs that can decrease the lifespan of the SSD and impact performance. The lower the write amplification, the longer will be the lifespan of SSD.

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.

DCToolkit	--disk 1 --	setmax	--set 12345678
DCToolkit	--disk 1 --	setmax	--read-native-max
DCToolkit	--disk 1:c --	nvme-management-namespace --set-lba

900000000 or

DCToolkit -d 1 -M -s 12345678 DCToolkit -d 1 -M –r

DCToolkit -d 1:c -NM –sl 900000000

Revision 1.2

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