Buffalo TeraStation TS5420DN0 User manual

Network Attached Storage
TeraStation 5020
User Manual
Please make sure to read this manual before using and follow the procedures. If you have any inquiries about
the product, contact the number on the warranty statement or the packing box. Do not discard the included
documents, the warranty statement, or the packing box.
www.buffaloamericas.com
35022387-02
November 2022

Table of Contents
Chapter 1 Notice .............................................................9
Regulatory Compliance Information..............................................9
Warning Symbols and Graphical Icons on the Product.................9
Safety Precautions ...........................................................................9
Chapter 2 Getting Started .......................................... 11
Diagrams........................................................................................ 11
4-Bay and 8-Bay Desktop Models, 4-Bay Rackmount Model ...............11
12-Bay Rackmount Model .......................................................................14
Turning the TeraStation On and Off............................................. 16
Creating a USB Initialization Drive .............................................. 16
Accessing Settings ........................................................................ 16
Opening Settings .....................................................................................17
Configuring Settings via Setup Wizard ..................................................19
Checking the Device Information from Dashboard ..............................20
Shutting Down or Restarting the TeraStation from Settings ...............20
Chapter 3 File Sharing................................................. 22
Configuring Shared Folders ......................................................... 22
Adding a Shared Folder...........................................................................22
Recycle Bin................................................................................................24
Read-Only Shares.....................................................................................24
Hidden Shares ..........................................................................................25
Configuring Users ......................................................................... 25
Adding a User...........................................................................................25
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Importing User Information....................................................................28
Adding a Group ............................................................................. 28
Configuring Access Restrictions .................................................. 31
Restricting Local User Access to Shared Folders ...................................31
Restricting AD Domain User Access to Shared Folders.........................33
Restricting Access to Subfolders ............................................................36
Accessing from a macOS Device .................................................. 38
Accessing from an NFS Client....................................................... 39
Offline Files for Windows.............................................................. 44
Chapter 4 RAID Modes and Drive Management ....... 47
Available RAID Modes .................................................................. 47
Working with RAID Arrays............................................................ 48
Using JBOD...............................................................................................48
Creating a RAID Array..............................................................................49
Shutting Down the TeraStation Automatically If an Error Occurs........50
Rebuilding the RAID Array Automatically for the TS51220RH.............52
Configuring Actions for If a Drive Used for the RAID Array Has Not Been
Detected ...................................................................................................53
Configuring a Hot Spare..........................................................................56
Expanding RAID Capacity Without Deleting Data ................................57
RAID Scanning..........................................................................................61
Configuring Low Drive Space Alerts............................................ 62
Adding an External Drive ............................................................. 63
Dismounting Drives ...................................................................... 64
Using the Function Button ......................................................................64
Using Settings ..........................................................................................65
Checking Drives ............................................................................ 65
2

S.M.A.R.T. ....................................................................................... 67
Displaying S.M.A.R.T. Information .........................................................67
Checking the Drive Condition.................................................................68
Formatting Drives ......................................................................... 68
Encrypting Drives.......................................................................... 70
Erasing Data on the TeraStation Completely.............................. 70
Quotas............................................................................................ 71
Limits for Shared Folders ........................................................................71
Limits for LVM Volumes ...........................................................................72
Using the TeraStation as an iSCSI Device .................................... 74
Introduction .............................................................................................74
Creating an iSCSI Volume........................................................................75
Connecting or Disconnecting Volumes..................................................77
Using with Multiple Computers..............................................................78
Configuring Access Restrictions .............................................................78
Expanding Volume Sizes .........................................................................82
Deleting Volumes.....................................................................................83
Enabling the iSNS Protocol .....................................................................84
Advanced iSCSI Volume Settings............................................................85
Chapter 5 Backup ........................................................ 87
Using Snapshots............................................................................ 87
Overview ..................................................................................................87
Application for iSCSI Volume Snapshots ...............................................87
Manually Creating a Snapshot................................................................87
Accessing the Snapshots via SMB...........................................................91
Restoring Snapshots................................................................................93
Configuring Schedule Snapshot.............................................................97
3

Configuring Snapshot Archive Settings...............................................101
Backing Up Data on the TeraStation.......................................... 106
Backup Modes........................................................................................107
Preparing a Backup Destination...........................................................110
Configuring a Backup Job .....................................................................112
If Backing Up from rsync-Compatible Devices to the TeraStation.....117
Restoring Backup Data..........................................................................117
Backup Logs for If Backup Fails ............................................................121
Replication................................................................................... 124
Preparing a Replication Destination ....................................................125
Configuring a Replication Job ..............................................................127
Synchronizing Between Source and Destination TeraStations
Periodically.............................................................................................130
Failover ........................................................................................ 131
Before Configuring Failover..................................................................131
Usage Restrictions .................................................................................132
Configuring Failover..............................................................................133
Changing Settings While Failover Is Configured.................................135
Maintenance Mode ................................................................................135
Synchronizing Between Main and Backup TeraStations Periodically138
Switching to the Backup TeraStation Manually...................................139
Reconfiguring After Failover Occurs ....................................................140
Stopping Failover...................................................................................142
Backing Up Your Mac with Time Machine ................................. 144
Chapter 6 Cloud Services and Remote Access......... 150
Synchronizing with Amazon S3 ................................................. 150
Creating an Amazon S3 Job ..................................................................150
Uploading Files to Amazon S3..............................................................153
4

Synchronizing with Dropbox ..................................................... 156
Creating a Dropbox Sync Job................................................................157
Changing Job Settings ..........................................................................159
Creating a Shared Link (Windows Only)...............................................162
Using Microsoft Azure for Data Preservation ........................... 162
Creating an Azure Storage Sync Backup Job.......................................162
Creating an Azure Storage Sync Restore Job.......................................170
Changing Job Settings ..........................................................................175
Synchronizing with Microsoft OneDrive................................... 177
Creating a OneDrive Sync Job...............................................................177
Changing Job Settings ..........................................................................188
Corrective Actions for in Case of Error .................................................190
WebAccess ................................................................................... 193
Configuring WebAccess.........................................................................193
Accessing via WebAccess.......................................................................196
Unable to Create a BuffaloNAS.com Name..........................................197
FTP................................................................................................ 198
Chapter 7 Security Enhancement............................. 201
Two-Factor Authentication ........................................................ 201
Enabling Two-Factor Authentication ...................................................201
Restricting Logins for Non-Admin Users..............................................207
Disabling Two-Factor Authentication ..................................................208
Encrypting Data Transmission ................................................... 210
Encrypting Settings Data ......................................................................210
Encrypting FTP Transfer Data ...............................................................211
SSL...........................................................................................................211
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Chapter 8 Settings Backup/Restoration .................. 213
Saving and Applying Settings.................................................... 213
Saving Settings ......................................................................................214
Applying Settings ..................................................................................214
Transferring Another Buffalo NAS Device’s Settings ............... 215
Creating a Config File (.nas_config)......................................................216
Transferring Settings.............................................................................216
Restoring Factory Defaults......................................................... 217
Initializing from Settings ......................................................................217
Initializing Using the USB Initialization Drive .....................................218
Resetting the Administrator Password ..................................... 219
Chapter 9 Network Settings ..................................... 220
Wake-on-LAN .............................................................................. 220
Port Trunking............................................................................... 220
SNMP............................................................................................ 224
Proxy Server ................................................................................ 226
Jumbo Frames ............................................................................. 227
Changing the IP Address ............................................................ 228
Mapping IP Address and Hostname .......................................... 229
Chapter 10 Advanced Features ................................ 232
Email Notification ....................................................................... 232
Sleep Mode .................................................................................. 234
UPS (Uninterruptible Power Supply)......................................... 236
One PSU Device Is Installed...................................................................237
6

Two PSU Devices Are Installed..............................................................238
Automatic Shutdown If Power Supply Fails.............................. 240
Logs .............................................................................................. 241
Displaying TeraStation’s Logs ...............................................................241
Transferring Logs to the Syslog Server ................................................242
Creating a Shortcut to the Logs in the Shared Folder.........................243
Changing Archive Rules for File Access Logs.......................................244
Updating the Firmware............................................................... 246
Updating Manually Using Settings ......................................................246
Enabling Automatic Update..................................................................247
Configuring Update Notification..........................................................248
Name, Date, Time, and Language .............................................. 249
Beep Alerts .................................................................................. 251
LCD and LEDs............................................................................... 252
Chapter 11 Drive Replacement and Troubleshooting ...
..................................................................................... 254
Replacing a Defective Drive on the TS51220RH ....................... 254
Drive Replacement for a Redundant RAID Array.................................254
Drive Replacement for a RAID 0 Array .................................................256
Drive Replacement for a JBOD..............................................................257
Drive Replacement for a Hot Spare ......................................................257
Replacing a Defective Drive on Models Other Than the
TS51220RH .................................................................................. 257
Drive Replacement for a Redundant RAID Array or JBOD (TeraStation Is
On)...........................................................................................................258
Drive Replacement for a Redundant RAID Array or JBOD (TeraStation Is
Off)..........................................................................................................262
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Drive Replacement for a RAID 0 Array .................................................262
Drive Replacement for a Hot Spare ......................................................263
Replacing a Non-Malfunctioning Drive..................................... 264
Re-Inserting Drives ..................................................................... 264
TeraStation Does Not Work Properly......................................... 265
Power LED Keeps Blinking ....................................................................265
Booting the TeraStation in Emergency Mode......................................267
Unable to Access Shared Folders ............................................... 267
Opening the Network Credentials Window .........................................267
Restoring Owner and Permission Settings ..........................................268
Configuring Compatible SMB Protocols ..............................................270
Cleaning the Dustproof Filter .................................................... 270
Chapter 12 Utilities.................................................... 273
NAS Navigator2........................................................................... 273
Windows .................................................................................................273
macOS.....................................................................................................273
NovaBACKUP ............................................................................... 273
Chapter 13 Appendix ................................................ 274
LCD Panel..................................................................................... 274
Modes .....................................................................................................274
Errors.......................................................................................................275
Notices ....................................................................................................276
Information Events ................................................................................277
Default Settings .......................................................................... 279
Specifications .............................................................................. 280
8

Chapter 1 Notice
Regulatory Compliance Information
For Customers in the United States
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this
device may not cause harmful interference, and (2) this device must accept any interference received, including
interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when
the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at his own expense.
Warning Symbols and Graphical Icons on the Product
Warning symbols are used on the product for safety operation and prevention of injury to you and damage to the
unit. The following explains the meanings of symbols used on the product.
This symbol indicates important warnings or cautions for operation and maintenance.
Additional information will follow this symbol.
This symbol indicates the presence of an alternating current.
This symbol indicates that the equipment may carry risk of electric shock.
This symbol indicates danger of hazardous high voltage.
This symbol indicates a protective earthing terminal.
This symbol indicates that the protective conductor should be connected first to the protective
earthing terminal.
This symbol indicates that the rack-mounted equipment should not be used for a shelf or a work
space.
Safety Precautions
Before using your device, basic safety instructions should always be followed.
(1) Read these instructions.
(2) Keep these instructions.
(3) Heed all warnings and follow all instructions.
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Chapter 1 Notice

(4) The device can only be used in a fixed location, such as a telecommunication center or a dedicated computer
room. When you install the device, ensure that the protective earthing connection of the socket-outlet is verified
by a technician.
(5) The socket-outlet shall be installed near the equipment and shall be easily accessible.
(6) Only use the cables and accessories that are included in the package. Don’t use other accessories or cables
unless specifically instructed to in the documentation.
(7) Caution: Slide/rail mounted equipment is not to be used as a shelf or a work space.
(8) Caution: Do not remove the cover.
(9) Do not ingest battery in case of a chemical burn hazard. This product contains a coin/button cell battery.
If the battery is swallowed, it can cause severe internal burns within 2 hours and may lead to death. If you think
batteries might have been swallowed or placed inside any part of the body, seek immediate medical attention.
(10) Caution: Do not replace the battery. There is risk of explosion if the battery is replaced with one that is
an incorrect type.
(11) High touch current. Connect to earth before connecting to supply.
(12) Warning: Hazardous moving parts. Keep away from moving fan blades.
(13)This equipment is not suitable for use in locations where children are likely to be present.
10
Chapter 1 Notice

Chapter 2 Getting Started
Diagrams
Depending on the number or type of drives in the unit, the model name will be different. Check the sticker on the
packing box for your unit’s model name.
4-Bay and 8-Bay Desktop Models, 4-Bay Rackmount Model
TS5420DN
11
15
16
17
18
19
22
14
13
12
8
9
10
7654321
24
23
25
23
TS5420RN
24
25
23
23
1 122113 20 13 3 4 5 6 713 98 1310 15
2214 21 15 16 17 18 19 14
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Chapter 2 Getting Started

TS5820DN
11
15
16
17
18
19
22
14
25
24
23
13
12 23
89102 3 4 5 6 7
15
1
1 Power Button
Press this button to power on the TeraStation. To power off the TeraStation, press and hold down the power
button for five seconds.
If the TeraStation beeps, pressing and holding this button for a short period will stop the beeping.
2 Power LED
When the TeraStation is on, the LED glows green.
3 Info LED
If there is a status message, the info LED will light up amber. Check the LCD panel to see the status message.
4 Error LED
If there is an error, the error LED will light up red. Check the LCD panel to see the error message.
5 LAN1 LED
When LAN port 1 is connected, this LED glows green and blinks when the connection is experiencing activity.
6 LAN2 LED
When LAN port 2 is connected, this LED glows green and blinks when the connection is experiencing activity.
7 LAN3 LED
When LAN port 3 is connected and the connection is experiencing activity, this LED glows blue.
8 LCD Panel
This display shows the status of many TeraStation settings. It also displays errors and messages when available.
9 Display Button
Press to switch between the different display modes. Also, if the TeraStation is beeping, press this button to
stop it.
10 Function Button
Use this button for dismounting USB devices, rebuilding RAID arrays, configuring failover, stopping the
TeraStation’s beeping, and initializing settings using a USB drive.
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Chapter 2 Getting Started

11 Drive Lock
Open the front panel with the key to replace drives or access the init button.
12 Reset Button
Press and hold down this button with something pointed to initialize the TeraStation’s admin username and
password, two-factor authentication settings, IP settings, SSL, and service port restriction settings to their
factory default values. The effects of this button can be changed in Settings.
During initialization, the TeraStation will beep and the I23 message will appear as a notification. When
initialization finishes, the TeraStation will stop beeping and the I23 message will disappear.
13 Drive Status LEDs
Normally, these LEDs blink green when drives are accessed. If a drive fails, its LED will turn red.
14 Fan
Spins to prevent overheating inside. Do not block the fan.
15 USB Port
Compatible USB drives, USB memory devices, and USB UPS devices can be connected. USB hubs are not
supported.
For the TS5820DN TeraStation model, the USB port in front is covered by a protector. Remove it before use.
16 LAN Port 1 (1GbE)
Connect an Ethernet cable to use this port for your network. It is available for communicating at max. 1000
Mbps.
17 LAN Port 2 (1GbE)
Connect an Ethernet cable to use this port for your network. It is available for communicating at max. 1000
Mbps.
18 LAN Port 3 (10GbE)
Connect an Ethernet cable to use this port for your network. It is available for communicating at max. 10 Gbps
if using the included Ethernet or category 6A cable.
Note: To communicate at up to 10 Gbps, all connected network devices must be compatible with 10GbE.
19 Power Connector
Use the included power cable to connect to a UPS, surge protector, or outlet.
20 Serial Number
This sticker shows the TeraStation’s serial number.
21 UID Button
Press this button to cycle the blue LED on and off.
22 Anti-Theft Security Slot
Use this slot to secure your TeraStation with a cable lock (not included).
23 Link/Act LED
Glows green when the TeraStation is connected to a network at 1000 Mbps. It blinks when the connection is
experiencing activity.
24 Link/Act LED
Glows amber when the TeraStation is connected to a network at 100 Mbps, 2.5 Gbps, or 5 Gbps. It blinks when
the connection is experiencing activity.
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Chapter 2 Getting Started

25 Link/Act LED
Glows blue when the TeraStation is connected to a network at 10 Gbps. It blinks when the connection is
experiencing activity.
12-Bay Rackmount Model
TS51220RH
8
9
10
13 1514 16 17 18 1911
20
22
2021
7
1
4
5
6
2
3
12
1 Power Button
Press this button to power on and off the TeraStation. If the TeraStation beeps, pressing and holding this
button for a short period will stop the beeping.
2 Power LED
When the TeraStation is on, the LED glows green.
3 Error LED
If there is an error, the error LED will light up red.
Note: The error LED will be extinguished if the TeraStation is powered off. Check the Settings interface or NAS
Navigator2 to see the error message before powering off the TeraStation.
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Chapter 2 Getting Started

4 Reset Button
Press and hold down this button with something pointed to initialize the TeraStation’s admin username and
password, two-factor authentication settings, IP settings, SSL, and service port restriction settings to their
factory default values. The effects of this button can be changed in Settings.
During initialization, the TeraStation will beep and the I23 message will appear as a notification. When
initialization finishes, the TeraStation will stop beeping and the I23 message will disappear.
5 Function Button
Use this button for rebuilding RAID arrays, configuring failover, stopping the TeraStation’s beeping, and
initializing settings using a USB drive.
6 LAN LED
When any LAN ports are connected, this LED glows blue.
7 Info LED
If there is a status message, the info LED will light up amber. Check the Settings interface or NAS Navigator2 to
see the status message.
8 Drive Status LED
Glows blue when drives are detected. It blinks when drives are accessed.
9 Drive Error LED
Normally, this LED is extinguished. If a drive fails, its LED will turn red.
10 USB 2.0 Port
Compatible USB UPS devices can be connected. USB drives and USB hubs are not supported.
11 Power Connector
Use the included power cable to connect to a UPS, surge protector, or outlet.
12 Beep Off Button (for Power Supply Unit)
If a PSU error occurred, you will hear the beep from the TeraStation. To stop beeping, press this button.
13 Fan (for Power Supply Unit)
Spins to prevent overheating inside. Do not block the fan.
14 Factory use only.
15 USB 3.2 Gen 1 Port
Compatible USB drives, USB memory devices, and USB UPS devices can be connected. USB hubs are not
supported.
16 LAN Port 1 (1GbE)
Connect an Ethernet cable to use this port for your network. It is available for communicating at max. 1000
Mbps.
17 LAN Port 2 (1GbE)
Connect an Ethernet cable to use this port for your network. It is available for communicating at max. 1000
Mbps.
18 LAN Port 3 (10GbE)
Connect an Ethernet cable to use this port for your network. It is available for communicating at max. 10 Gbps
if using the included Ethernet or category 6A cable.
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Chapter 2 Getting Started

Note: To communicate at up to 10 Gbps, all network devices must be compatible with 10GbE.
19 LAN Port 4 (10GbE)
Connect an Ethernet cable to use this port for your network. It is available for communicating at max. 10 Gbps
if using the included Ethernet or category 6A cable.
Note: To communicate at up to 10 Gbps, all network devices must be compatible with 10GbE.
20 Link/Act LED
Glows green when the TeraStation is connected to a network. It blinks when the connection is experiencing
activity.
21 Link/Act LED
Glows amber when the TeraStation is connected to a network at 100 Mbps, 2.5 Gbps, or 5 Gbps. It blinks when
the connection is experiencing activity.
22 Link/Act LED
Glows blue when the TeraStation is connected to a network at 10 Gbps. It blinks when the connection is
experiencing activity.
Turning the TeraStation On and Off
Note: Do not disconnect or reconnect the internal drives while turning the TeraStation on or off.
Press the power button on the TeraStation to turn it on.
To turn off the TeraStation, press and hold down the power button for three seconds. Don’t unplug the power cable
without powering the TeraStation off first.
When the power LED turns off, the shutdown process is finished.
You can also shut down or restart the TeraStation remotely from Settings. For the detailed procedure, refer to the
“Shutting Down or Restarting the TeraStation from Settings”section below.
Creating a USB Initialization Drive
We recommend creating a USB initialization drive as soon as possible. This USB drive can be used to initialize the
TeraStation’s settings to its factory default values or recover the system if your TeraStation encounters an error
that prevents the unit from booting. For the detailed procedure, refer to the“Creating a USB Initialization Drive”
subsection in chapter 8.
Accessing Settings
Configure and manage your TeraStation using the Settings interface, accessible from a browser window. Open
the interface using the appropriate procedure below or type the TeraStation’s IP address into the URL field of your
browser.
Note: Microsoft Edge, Firefox, Google Chrome, Internet Explorer 9 or later, and Safari 9 or later are supported. If you
have difficulty viewing Settings, check the following:
• If there are a large number of registered users, groups, or shared folders, use another browser instead of Internet
Explorer.
• If you have a proxy server enabled in the browser settings, configure the exception settings for Settings or disable
the proxy server.
• With Internet Explorer, set security to Local intranet. On Windows Server operating systems, higher-level security
is configured by default. Set the security to a lower level temporarily.
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Chapter 2 Getting Started

Opening Settings
1 Double-click the NAS Navigator2 icon ( ) to start NAS Navigator2.
2 Right-click your TeraStation’s icon and select Open Settings. For macOS, select the TeraStation’s icon while
holding down the control key, then select Open Settings.
3 Enter the username and password, then click OK.
Notes:
• If the time-out period is set to“10 minutes”, you will be logged out of Settings after 10 minutes of inactivity.
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Chapter 2 Getting Started

• Click Secure Connection to log in using an encrypted connection. For detailed information about encrypted
connections, refer to the “Encrypting Data Transmission” section in chapter 7.
4 If you did not enable two-factor authentication, skip to step 5. Otherwise, refer to the authenticator app on
your mobile device for the verification code. Enter the verification code and click OK.
Note: For detailed information about two-factor authentication, refer to the“Two-Factor Authentication”
section in chapter 7.
5 Settings will open.
Notes:
• Username/Password Combinations:
Username Password Settings Available
admin (default) password (default) All
guest blank Guest user information
18
Chapter 2 Getting Started

Username Password Settings Available
Your username Your password
If a user is assigned as an administrator, all settings are
available. If assigned to a power users group, creating
or editing shared folders, users, and groups is available.
If assigned to a general users group, only changing the
password of logged-in users is available.
• Click at the top-right of Settings and choose I'm here to have the TeraStation beep so it can be located easily.
Configuring Settings via Setup Wizard
When you access Settings for the first time, or after initializing the TeraStation’s settings, the setup wizard will
automatically appear to help you configure several TeraStation settings, such as RAID mode and proxy server
settings.
An example screen of the setup wizard is displayed below. Step through the wizard to configure any desired
settings. If there is any setting you would like to configure later, click Skip to move to the next setup wizard screen,
or click Cancel to exit the wizard. You may run the setup wizard at a later time after initial setup, or after system
initialization.
Example of Setup Wizard Screen
To launch the setup wizard at a later time, follow the procedure below.
1 From Settings, click Management.
2 Click the settings icon ( ) to the right of“Restore/Erase”.
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Chapter 2 Getting Started