Admin Password 
The administrator's password can be changed here. First enter the current password and then the new password. Type in the new password again and then click 'Save Settings' to put the change into effect.
There are three choices for setting the time.

Time Configuration
Select your time zone from drop-down menu.

NTP Server
Enter an NTP Server here. An NTP Server is a server on the Internet that maintains time. The DNS-321 will contact the server you enter and receive the correct time. Click 'Save Settings' after entering an NTP Server.

Set The Date And Time Manually
Enter the complete time and date settings manually. Click 'Save Settings' to apply these settings.

Set time from my computer
Click 'Save Settings' to have the DNS-321 set its own clock according to the time on your computer.

Click 'Restart' to reboot the DNS-321.

Click 'Restore' to reset the DNS-321 to factory default settings. Use the restore feature only if necessary as this will erase all previously saved settings on the unit. This process will not harm or change any data on the internal drives.

Power off the unit.

Configuration Settings
Save configuration settings by pressing the 'Save' button and then choosing a location for the configuration file to be saved to.

Load configuration settings by pressing the 'Browse' button to find the configuration file, then pressing the 'Load' button to load the file.

Idle Time
Enter a value for the Config Inactivity Timer. If the administrator is idle for longer than the specified time, he will be logged out of the configuration area.

Enter a value for the Download Schedule Inactivity Timer. If a user is idle for longer than the specified time, he will be logged out of the Schedule Download area.

Click 'Apply' when finished. Click 'Apply' when finished.


You can update the firmware of the device from this page. The firmware you want to use must be saved on the local hard drive of the computer you are working from. Click on 'Browse' to search the local hard drive for the firmware to be used for the update. Click 'Apply' to begin the update. Please check the D-Link support site for firmware updates at D-Link Support Page.
E-Mail Alerts
Login Method
Select 'Account' if your SMTP server requires authentication. Select 'anonymous' if it does not.

User Name
If 'Account' is selected, enter the user name of your e-mail account.

If 'Account' is selected, enter the password for your e-mail account.

SMTP Server
Enter the SMTP Server address. This will be your outgoing mail server address. If you are not sure what this is, contact the company that provides e-mail services to you.

Sender E-Mail
Enter the Sender's e-mail address. This is the address that the e-mail alerts will appear to be coming from.

Receiver E-Mail
Enter the Receiver's e-mail address. This is the address you want the e-mail alerts sent to.

Alert Types
Select the events that need to occur after which you will receive an email alert. Information about the events you selected will be e-mailed to the above address.

Click 'Save Settings' when finished.

Power Management 
Hard Drive Hibernation Settings
Enable or disable the HDD hibernation feature.

In addition, you can select the amount of time before the hard drives will hibernate (spin down). Remember that the device will stay powered on. Only the hard drives will lose power. They will re-gain power immediately after attempting to access them.

Click 'Save Settings' when finished.

Choose from 4 different volume configurations in this section. By pressing the 'Create' button, you can create a volume and assign a RAID level to it. Note that all data will be lost during this process.

Can be used to create up to 4 separate volumes. Each hard drive is its own volume.

JBOD (Linear)
A JBOD (Just a Bunch Of Disks) configuration combines both 2 or more drives in a linear fashion which will create one large volume geared towards maximum available space.

Combines 2 or more hard drives in a striped fashion which will create one large volume geared towards maximum performance.

Mirrors the hard drives for redundancy. If one hard drive fails, the other still has all of the data. Replace the failed hard drive and it will re-mirror, restoring maximum data protection.

Set RAID Type and Reformat
Click this button to format your hard drives, create a new volume, and assign a RAID level to the new volume.

Enable Auto-Rebuild
Auto-Rebuild allows a degraded RAID 1 array to be automatically rebuilt when the failed hard drive is replaced by automatically restoring data from the existing hard drive to the newly inserted hard drive.

Disable Auto-Rebuild
A rebuild is ONLY performed when triggered by the user. To manually rebuild a volume, click on the "Manually Rebuild Now" button.

Click 'Apply' when finished.
Enable this option only if you have purchased your own domain name and have registered with a dynamic DNS service provider. The following parameters are displayed when the option is enabled.

Server Address
Select a dynamic DNS service provider from the pull-down list.

Host Name
Enter your fully-qualified host name. For example:

Username or Key
Enter the username or key provided to you by your service provider. If the Dynamic DNS provider supplies only a key, enter that key in all three fields.

Password or Key
Enter the password or key provided to you by your service provider. If the Dynamic DNS provider supplies only a key, enter that key in all three fields.

Verify Password or Key
Re-type the password or key provided to you by your service provider. If the Dynamic DNS provider supplies only a key, enter that key in all three fields.

Displays the connection current status to the Dynamic DNS server.

S.M.A.R.T Test
S.M.A.R.T stands for "Self-Monitoring, Analysis, and Reporting Technology". This is a system on a hard drive used to monitor and report on the health of the drive. If the HD is grayed out, then it does not support S.M.A.R.T.

In this section, you will be able to perform 2 tasks:
1. Run a Quick Test
2. Run an Extended Test

Quick Test - Runs a quick S.M.A.R.T test. The test usually takes less than 10 minutes. This test will check the electrical, mechanical, and read performance of the hard drive. The results are displayed as Passed/Failed on the web UI and can also be sent as an email alert.

Extended Test - Runs an extended S.M.A.R.T test. This test requires a lot more time to complete. However, it is a more thorough and complete test when compared to the Quick Test.

To run the S.M.A.R.T test, select the hard drive you wish to perform the S.M.A.R.T test on. Then select whether to run a Quick or Extended S.M.A.R.T test. Then press "Start" to run the test.

Send Result By Email
Enable this function in order to have the results of the S.M.A.R.T test sent to you by email.

Create Schedule
Click on this button in order to create a scheduled S.M.A.R.T test. You will be able to schedule a test on a daily, weekly, and monthly basis.

Scan Disk
Scan Disk will scan your system's file system for errors and/or corruption. After completion, any errors on your file system will be displayed accordingly.