User manual

To verify that a disk volume is encrypted, log into the NAS as an administrator. Go to

"Storage Manager" > "STORAGE" > "Storage Space". The encrypted disk volume will be

shown on this page, with a lock icon under "Status". The lock will be shown as opened if the

encrypted volume is unlocked. A disk volume without the lock icon under "Status" is not

encrypted.

Behaviors of encrypted volumes upon system reboot

An example is provided to illustrate the behavior of encrypted volumes upon system reboot.

In this example, there are two encrypted disk volumes on the NAS:



DataVol1 is created with the option "Save Encryption Key" disabled.



DataVol2 is created with the option "Save Encryption Key" enabled.

Note:

For details on enabling or disabling the "Save Encryption Key" option, please refer

to the section on Encryption Key Management above.

After restarting the NAS, check the volume status. DataVol1 is locked, but DataVol2 is

unlocked and mounted. Since the encryption key is not saved on DataVol1, the encryption

password needs to be manually entered to unlock DataVol1. Please remember that by

saving the key on the NAS, data will only be protected in case of stolen hard disk drives.

However, there is still a risk of data breach if the entire NAS is stolen as the data is

accessible after the NAS is restarted. If the encryption key is not saved on the NAS, the NAS

will be protected against data breach even if the entire NAS were stolen. The disadvantage

is that the disk volume needs to be manually unlocked each time the system restarts.

Setting Space Reclamation and SSD Trim

Space Reclamation allows you to reclaim space from deleted files to increase free space for

storage pools, while SSD Trim enables the SSD to handle garbage collection overheads and

improves future Write performance.

Click "Global Settings" (the "setting" icon next to "?" on the top-right side of the screen) to

enable the function and its schedule. You will see two settings for Space Reclamation and

SSD Trim:



Auto reclaim and SSD trim schedule: the thin provisioning space reclamation will be

started based on the schedule you set in order to reclaim space and increase free space

for storage pools.



Schedule: Set the Space and Reclamation and SSD Trim schedule.