QNAP Disk On-line Server NAS-2100, User Manual

Page 1: ...Disk On line Server QNAP Systems Inc NAS 2100 User Manual ...

Page 2: ...Broadband Network Attached Storage NAS 2100 User Manual Version 4 1 4 Copyright 2005 QNAP Systems Inc All Rights Reserved March 29 2005 2 ...

Page 3: ...with respect to its products or the contents or use of this documentation and all accompanying software and specifically disclaims its quality performance merchantability or fitness for any particular purpose QNAP reserves the right to revise or update its products software or documentation without obligation to notify any individual or entity CAUTION 1 Back up your system periodically to avoid an...

Page 4: ...r Management 33 3 8 Network Share Management 37 3 9 System Tools 41 3 9 1 SNMP Settings 41 3 9 2 Alert Notification 42 3 9 3 Restart Shutdown 42 3 9 4 Hardware Settings 43 3 9 5 UPS 44 3 9 6 System Update 45 3 9 7 Change Logo 46 3 9 8 Remote Replication 47 3 9 9 Virus Scan 51 3 9 10 Backup Restore Reset Settings 56 3 9 11 Backup Agent 57 3 10 Statistics Logs 60 Chapter 4 Accessing Disk On line Ser...

Page 5: ...ailure or Malfunction 73 5 4 Power Outage or Abnormal Shutdown 73 Appendix A LCD Panel 74 Appendix B Web File Manager 77 Appendix C Quick Install Wizard 82 Appendix D NetBak Replicator 91 Appendix E Configuring AD Authentication 102 Appendix F Messages of Hard Disk and Disk Configuration Status 111 5 ...

Page 6: ...pports RAID 0 1 and JBOD storage management 10 100 Mbps fast Ethernet port Supports UPS management via USB port 1 2 Package Contents Your NAS package contains Disk On line Server stands inclusive Power cable CAT 5 Ethernet cable Companion CD user manual Quick Install Wizard and software inclusive Quick Installation Guide Important Notice Please back up your disk data periodically to avoid data los...

Page 7: ...1 3 System Overview Front View LED Indicators Disk 1 Disk 2 and Network Down button Enter button LCD panel Rear View 10 100 Mbps RJ 45 Ethernet port USB ports Reset button Power button Power Connector 7 ...

Page 8: ...its boot up process the LCD panel will display current IP address settings If your network does not support DHCP protocol you must configure your Disk On line Server to proper LAN settings before using it for the first time If you are not sure about the LAN settings please contact your network administrator You can change the network settings of Disk On line Server by the following ways 1 Use the ...

Page 9: ...orer 5 0 or later and Netscape Navigator 4 5 or later Microsoft Internet Explorer 5 5 is recommended 3 1 Accessing Administration Page 1 Launch the web browser Enter the IP address of Disk On line Server to access the administration page The IP address can also be obtained on the LCD display of Disk On line Server see Appendix A 2 Run Quick Installation Wizard see Appendix C and double click on an...

Page 10: ... name and password The default administrator name and password are User name administrator Password admin The first time you login Disk On line Server Quick Configuration page will be shown Please refer to the Quick Configuration section for more details 10 ...

Page 11: ...rking Create Disk Volume Delete Disk Volume Format Disk Volume View Disk Volume Status User Management Users User Groups Quota Create Create Multiple Users Change Password Create Private Network Share Assign User Groups Quota Settings Delete Create Create Private Network Share Assign Users Delete Create Property Access Control Delete Alert Notification Restart Shutdown Hardware Settings UPS System...

Page 12: ...3 3 Quick Configuration You can configure Disk On line Server step by step in Quick Configuration section 1 Enter the server name 12 ...

Page 13: ...2 Change the administrator password or select to use the original password 3 Enter the date time and select the time zone for the server 4 Select the language the server uses for file names 13 ...

Page 14: ...5 Enter the IP address subnet mask and default gateway for the server 6 Select the network file services to provide on the server 14 ...

Page 15: ...7 Configure disk volume on this server 8 Configure the method of user authentication 15 ...

Page 16: ...9 Manage users and user groups of this server 16 ...

Page 17: ...10 Manage network shares on this server 11 Finish It may take several to tens of minutes to complete Quick Configuration depending on your system settings 17 ...

Page 18: ...e settings and view system settings Server Name Enter the name of Disk On line Server The server name can be 14 characters long at maximum which can contain alphabets numbers and hyphens The server does not accept names containing empty characters period or names with only numbers 18 ...

Page 19: ...e the display time of the action will be incorrect 9 The system event log time will be incorrect compared to the actual time when an action occurs 9 NTP Server You can enable or use specified NTP server to update the date and time of the system automatically When there is no specified IP address for the NTP server the system will refer to internal clock for date and time settings 19 ...

Page 20: ...ay files and directories Select the correct language to avoid the following problems i Unable to create files or directories in special characters ii Unable to display file or directory name in special characters View System Settings You can view all current system settings e g server name on this page 20 ...

Page 21: ...for network connection enter the following information 9 Fixed IP Address IP address is a 32 bit digit used to differentiate each single entity on a network IP address is divided into four groups of eight bits separated by dots e g 192 168 0 1 9 Subnet Mask Subnet mask defines computers within the same local network It is a 32 bit digit e g 255 xxx xxx xxx 9 Default Gateway Gateway is generally re...

Page 22: ...dynamically allocated for DHCP service 9 End IP address The last IP address to be dynamically allocated for DHCP service 9 Lease time Define the lease time for the dynamic IP address 9 Primary DNS server When the system allocates an IP address to your computer the primary DNS server address is also specified to it 9 Secondary DNS Server When the system allocates an IP address to your computer the ...

Page 23: ...rst character cannot be a period 9 Standalone Server Use local users for user authentication 9 NT Domain Member Use Microsoft NT domain for user authentication 9 AD Domain Member Use Microsoft AD domain for user authentication Server Description Describe Disk On line Server e g administrator name department or location of the server for users to identify the server Users using Disk On line Server ...

Page 24: ...in Name Microsoft domain name Enter the domain name when you select NT domain or AD domain If the local network has a WINS server installed specify the IP address Disk On line Server will automatically register its name and IP address with WINS service If you do not want to enable WINS server support or you do not have a WINS server on your network enter 0 0 0 0 in the field for WINS server IP add...

Page 25: ...lt setting 4 NFS Service To use Disk On line Server on Unix Linux operating system computer or server enable NFS service Disk On line Server supports NFS version 2 0 and 3 0 To correctly use NFS service assign a user s UID and IP address Go to NFS Settings in Users of User Management for setup When you have completed the configuration login the system as root and use mount command to connect to th...

Page 26: ...e If you have a Novell server on your local network select the same frame type as the server s Internal Network Number This is a unique number to identify the server on a network The system will set it to the IP address if Auto configure option is selected Or you may enter a unique internal network number manually External Network Number This number identifies a logical network segment on a networ...

Page 27: ...Manager If Disk On line server is connected to the Internet and uses a valid IP address you can access files on the server by web browser from anywhere 7 FTP Service To download files from or upload files to Disk On line Server by using file transfer protocol FTP activate FTP service 27 ...

Page 28: ...8 View Network Settings You can view current network settings and status in this section 28 ...

Page 29: ...te use to store important data 3 RAID 0 Striping Disk Volume Striping disk combines two or more disks into one larger disk It offers the fastest disk access but it does not have any protection of your data if the striped array fails The disk capacity equals the number of disks in the array times the size of the smallest disk Striping disk is usually used to maximize your disk capacity or for fast ...

Page 30: ...disk applicable for servers with two or more disk volumes To use other disk configurations the settings can be changed during the first Quick Configuration access You can also administer your disk volume in the following ways i Create Disk Volume ii Delete Disk Volume 30 ...

Page 31: ...iii Examine Disk Volume 9 Disk Volume Operation Report This page shows the current status and information of disk volume operation 31 ...

Page 32: ...iv Format Disk Volume v View Disk Volume Status 32 ...

Page 33: ... and has access to system administration You cannot delete administrator Guest When you use a non registered user name to login the server will recognize the user as a Guest and will allow limited access A guest does not belong to any user group You cannot delete the user Guest or create a password Anonymous When you connect to the server by FTP service you can use the name to login as a guest You...

Page 34: ...as Chinese Japanese and Korean except 9 Password The password must be 6 16 characters long Avoid using codes that are easily decipherable You can perform the following settings for users i Create ii Create Multiple Users iii Change Password iv Create Private Network Share v Assign User Groups vi Quota Settings vii Delete 34 ...

Page 35: ... users belong to everyone group You cannot delete this group You can manage user groups with the following options i Create ii Create Private Network Share iii Assign Users iv Delete User groups name must not exceed 256 characters It is case insensitive and can contain double byte characters such as Chinese Japanese and Korean except the following ones To properly manage security it is very import...

Page 36: ... be used by each user When quota is set users are not allowed to further use disk space once they have reached their quota limit By default no limitations are set for users You can modify the following two options 9 Enable quota for all users 9 Quota size on each disk volume 36 ...

Page 37: ...types of files or provide different file access rights to users or user groups By factory default a public share folder is created which allows full access from all users or guests There are four options in Network Share Management i Create a network share ii Change the name path and comment of a network share iii Set access right for a network share iv Remove a network share 37 ...

Page 38: ...ata are stored under the assigned path onto the disk volume You can select Specify path automatically to allow the server to automatically create a new path on the disk volume to store the network share files Or you can assign a specific path for the share folder The path cannot exceed 256 characters and cannot contain the characters below 9 Comment Enter a brief description for the share folder T...

Page 39: ...ups 9 Deny access Access to the network share will be denied when this option is selected 9 Read only Users can read the files only on the network share when read only is assigned 9 Full access Users with full access are allowed to read write create or delete files and folders on the network share 39 ...

Page 40: ...the property of an existing network share select a share and click Property You can then edit the content of that share You can also select to delete an existing network share Click OK to confirm the deletion or Cancel to abort 40 ...

Page 41: ...isk On line Server 3 9 1 SNMP Settings Enable SNMP Simple Network Management Protocol service and complete all necessary settings to manage network components of the server by SNMP When enabling SNMP Trap Notification a message will be sent to a specified trap host when an error occurs 41 ...

Page 42: ... the e mail address of administrator and SMTP server IP address In case of warning or malfunction an email will be sent to the administrator automatically 3 9 3 Restart Shutdown Select to restart or shut down Disk On line Server 42 ...

Page 43: ...Enable configuration reset switch By enabling this option you can press the reset button for a few seconds to reset the administrator password and system settings to default iii Enable hard disk standby mode Set the minutes when there is no access to the server and the hard disk will go to standby mode iv Enable buzzer When buzzer is enabled an alert sound will be played in case of system error 43...

Page 44: ...et the shutdown timer to turn off the system automatically after the system detects the AC power is abnormal In general the UPS can keep supplying the power for the system for about 5 to 10 minutes But this depends on the maximum load of the UPS and the number of the loads connected to it UPS Model Select the UPS model from the list If the UPS model you are using is not available on the list pleas...

Page 45: ...of Disk On line Server make sure you have obtained the correct version of image file It is suggested to back up all existing data on Disk On line Server before updating the image The current settings will remain unchanged after the system is upgraded 45 ...

Page 46: ...3 9 7 Change Logo You can choose a personal picture to display on the login page of Disk On line Server The size of the picture cannot exceed 20K bytes 46 ...

Page 47: ... to replicate local files to remote folders on another server The files will be compressed before the replication process in order to save time for data transfer Using Remote Replication Login Disk On line Server go to Remote Replication in System Tools 47 ...

Page 48: ...settings and click OK to save or Cancel to quit Note To use remote replication enable Microsoft Networking service make sure the destination network share and directory have been created and the user name and password are valid to login the destination folder 48 ...

Page 49: ...ii Edit a Select the job to be edited b Click Edit c Modify the settings d Click OK to save or Cancel to quit 49 ...

Page 50: ...iii Delete a Select the job to be deleted b Click Delete 50 ...

Page 51: ...from being infected by viruses You need to operate Windows NT or Windows 2000 server with virus scanning software installed to perform real time virus scanning To enable virus scan support specify the IP address of network share the administrator ID and password 51 ...

Page 52: ...are are installed on the same computer which performs virus scanning before activating the agent Follow the steps below to install Virus Scan Agent 1 Run Install Virus Scan Agent in Disk On line Server companion CD 2 Click Next to continue Virus Scan Agent Setup 52 ...

Page 53: ...3 Click Finish to complete 4 A screen will pop up to show the system information the first time you have successfully installed the virus scan agent 53 ...

Page 54: ...been enabled and ready to be scanned User name and password have not been set up Infected Number of infected files Last Scan Time Date and time of the most recent virus scanning job Result Scanning result OK No files are infected Virus Found Virus is found The name of the infected file s may not be displayed due to the scanning of other files Go to administration page to view the name and location...

Page 55: ...upport check the box Enable Virus Scan Support Enter the IP address of the virus scan server and click Apply Viewing Details of Infected Files To view the details of infected files of the network share go to Event Logs of Statistics Logs A warning message will be shown in the table 55 ...

Page 56: ...ckup the setting s select the appropriate option s and click Backup To restore a backup settings file click Browse to select the file and click Restore To reset the setting s to factory default s select the appropriate option and click Reset 56 ...

Page 57: ...nt enables Disk On line Server to support particular backup programs In addition to being compatible with more tape drives and tape library backup agent also supports backup and restoration among multiple servers on different OS 57 ...

Page 58: ...ontact technical support for information of backup agent program 2 Install Backup Agent a Enter Disk On line Server administration page Go to System Tools and select Backup Agent b Click Browse to select Backup Agent program c Click Install Agent When the installation is completed the name of backup agent will be displayed e g NetVault 6 5 3 58 ...

Page 59: ...3 Configure and enable Backup Agent a Click Enable Backup Agent b Enter the password for Backup Agent c Click Apply The status will be shown as Running 59 ...

Page 60: ...on to the system Event Logs Disk On line Server can store thousands of recent event logs including warning error and information messages In case of system malfunction the event logs can be retrieved to help analyze the system problem DHCP Logs If DHCP server function is activated you can use it to monitor all of the assigned dynamic addresses client MAC addresses and other information 60 ...

Page 61: ...he workgroup and find the name of your Disk On line Server When the server is found double click on the server name to connect You may also use Search for Computers function to look for your Disk On line Server in Windows Under Windows ME or Windows 2000 please follow these steps i Open My Network Places ii Under the tool bar click Search iii Enter the name of Disk On line Server in Computer Name ...

Page 62: ...rk share will be displayed Select an appropriate network share folder and select Map Network Drive by right clicking on the item To make the share folder available for your next start up check the Reconnect at logon box on the popup window and click OK to map the folder as your network drive 62 ...

Page 63: ...user you can access Disk On line Server by the following ways 1 Using Network Browser a Choose Network Browser in Apple menu b In Network Browser choose AppleTalk A list of computers on the AppleTalk network will appear Select Disk On line Server 63 ...

Page 64: ...c Enter the login name and password or use Guest to enter Click Connect d When Disk On line Server is connected all network shares will be shown 64 ...

Page 65: ...e Choose a network share to connect The network share will appear on the desktop 65 ...

Page 66: ...2 Using Chooser a Select Chooser on Apple menu bar b Click on AppleShare The name of Disk On line Server will appear on the right side of the window 66 ...

Page 67: ...c Use the mouse to highlight Disk On line Server and click OK d Enter the correct login name and password or use Guest to login and then click Connect 67 ...

Page 68: ...e All available network shares will be listed Select a network share and click OK f Close the Chooser program Double click on the icon on the desktop to access the files 68 ...

Page 69: ...ng command mount t nfs 192 168 0 1 public mnt pub Note You must login as root user to initiate the above command 2 Login as the user id that you define you can use the mounted directory to access your network share files 4 4 Netware Service To use Novell Netware service enable this option and enter the server name for Netware network The server will then operate in a manner similar to a Novell Net...

Page 70: ...le operating systems Disk On line Server also supports connection via FTP Enter the correct user name and password to connect the server or access the public share folders as guest 1 Follow the steps below to use FTP service based on Windows 2000 as example 2 Click FTP 70 ...

Page 71: ...3 Enter user name and password 4 The share folder will be shown You can then manage the folder by dragging and dropping files to it as well as rename or delete the files 71 ...

Page 72: ... page and select Restart Shutdown in System Tools 3 Click Restart to reboot the server or Shut Down to turn off the server You can perform these actions by the LCD panel 5 2 Reset Administrator Password and Network Settings To reset the administrator password and network settings of Disk On line Server 1 Press the reset button of Disk On line Server for a few seconds A beep sound will be heard 2 L...

Page 73: ...ormal Shutdown In case of power outage or improper shutdown of Disk On line Server the system will resume to the state before it is shut down If your server does not function properly after restart please do the following 1 If the system configuration is lost configure the system again 2 In the event of abnormal operation of the server contact customer service for technical support To avoid the ab...

Page 74: ...00 172 17 26 19 IP address System name Check disk information and firmware version 1 Press button B to view disk information i e number of disks and disk size Press to view disk information DISK NUMBER 2 SIZE 76333 36MB 2 Press button B again to view the server model and firmware version Press to view model and firmware version NAS 2100 4 1 4 0120 74 ...

Page 75: ...ct one of the following options The one marked with means it is being used for connection DHCP DHCP will obtain IP address automatically STATIC IP Press button A to select STATIC IP Then configure the IP address i SET STATIC IP Press button B to enter 0 255 and press button A to set the next number for the IP address ii SET NETMASK Follow the above procedure to set the netmask address iii SET GATE...

Page 76: ...SYSTEM Press button B to select REBOOT SYSTEM and press button A to confirm restarting the system SELECT 3 REBOOT SYSTEM Exit Configuration Page EXIT Press button A and select EXIT then press the button again to confirm exiting the configuration page Press this button to select EXIT SELECT 4 EXIT Press again to confirm EXIT CONFIG PAGE 76 ...

Page 77: ...ile Manager and enter the correct login name and password You may also enter guest in the login name field with no password to access the network shares on Disk On line Servers as an anonymous guest Note Make sure a network share has been created before using Web File Manager Select an existing network share for management 77 ...

Page 78: ...file is downloaded you can open it on your computer Create folder i Select a network share or folder in which you want to create a new folder ii Click Create Folder on the toolbar iii Enter the name of the new folder and click OK Rename file or folder i Select a file or folder to rename ii Click Rename on the toolbar iii Enter the new file or folder name and click OK Delete file or folder i Select...

Page 79: ...older to upload file to ii Click Browse to select the file iii Click Upload Download file i Select a file to download ii Right click the mouse and select Save As to save the file Logout To exit Web File Manager click Logout 79 ...

Page 80: ...n Chinese you may have to configure the browser settings Take Internet Explorer as an example follow the steps below to configure the settings 1 Click on Tools in IE browser 5 Restart the browser 2 Click Internet Options 3 Cancel this option 4 Click OK 80 ...

Page 81: ...r Refresh reload the current page Home return to network share list home page Create folder Rename file or folder Delete file or folder Select all Cancel selection Logout Full access network share folder Read only network share folder Malfunction network share folder 81 ...

Page 82: ...nd time etc via Quick Install Wizard Screenshot System version Windows workgroup joined by Disk On line Server IP address of Disk On line Server Name of Disk On line Server Refresh the search results within the network Exit the program View help message for Quick Install Wizard Map network drive for the server View the details of selected Disk On line Server Configure the server name time and netw...

Page 83: ... line Server Select a Disk On line Server displayed on Quick Install Wizard and click Configure Enter the administrator password Upon successful login the following screen will appear Enter the configuration values and click OK 83 ...

Page 84: ...ou may have to restart Disk On line Server after changing the network configuration Set the name date and time for Disk On line Server The length cannot exceed 14 characters The system will obtain IP address automatically To use fixed IP address for connection enter the IP address subnet mask and gateway for the server 84 ...

Page 85: ...2 View Disk On line Server details Select a Disk On line Server available on Quick Install Wizard and click Details The following screen will be shown 85 ...

Page 86: ...3 Map drive a Select a Disk On line Server and click Map Drive b Select the correct network share and click Map Network Drive Then select the drive letter for connection 86 ...

Page 87: ...c Enter the password for the network drive 87 ...

Page 88: ...4 Search for all available Disk On line Server again To refresh the search results click Refresh to display all available servers within the network 88 ...

Page 89: ...5 Help Click Help to view the instructions of Quick Install Wizard 89 ...

Page 90: ...6 Enter the home page of Disk On line Server Double click on Disk On line Server to enter the administration page 90 ...

Page 91: ...ule You can specify a schedule for backing up data with this option e g 12 00 every day or 05 00 every Saturday Monitor When this option is enabled the system will upload all files or folders to the server instantly for backup when the files or folders are modified 2 Restore Select this option to restore backed up data to the original location of the file or to a new directory 3 Log Enable this op...

Page 92: ...Installing Netbak Replicator 1 Run Install NetBak Replicator in the companion CD 92 ...

Page 93: ...2 Follow the steps to install NetBak Replicator Then click Finish 3 Upon successful installation a shortcut icon will be shown on the Desktop 93 ...

Page 94: ...Using NetBak Replicator 1 Create a share folder for backup in NAS 2 Run NetBak Replicator Click All NAS and their share folders within the network will be displayed 94 ...

Page 95: ... enter the IP address of NAS for data backup Then click OK Note Only authorized users can access the share folders Double click the folder The system will prompt for user name and password to authenticate the access privilege of the users 95 ...

Page 96: ...can start the backup procedure upon successful connection to the NAS Backup Select files and folders for backup 9 File Filter Click File Filter to select file format to be skipped from backup Then click OK 96 ...

Page 97: ...9 Schedule Click Schedule on NetBak Replicator main page Then check the box Enable Backup Schedule and select the frequency and time for backup Click OK to confirm 97 ...

Page 98: ...itialize Configuration When using this function NetBak Replicator will record all current settings of the user including whether or not monitor function is enabled When the user login again this program will load the previous recorded settings for users to manage data backup 98 ...

Page 99: ... location that the data will be restored to b Select new restore position Click to select the directory to restore data to or select a previously chosen location from the drop down menu c Start Select the folder s and sub folder s for restoring data 99 ...

Page 100: ...d Option Select recovery option and error option 100 ...

Page 101: ... Log a Clear All Click this button to clear all logs b Option Select the type of logs to be recorded Record all logs or Record error logs only 101 ...

Page 102: ...ronment AD environment mixed mode can be supported by NAS firmware version 4 1 3 For example qatest com tw and sub2 qatest com tw are domains controlled by Windows 2003 server and sub1 qatest com tw domain is controlled by Windows 2000 server 102 ...

Page 103: ...Adding NAS to Windows Server 2003 Active Directory Domain 1 Go to TCP IP Configuration in Network Settings Enter the IP address of primary DNS server You can inquire AD domain via this DNS server 103 ...

Page 104: ...Member and enter the domain name and the user name with administrator access right to that domain Note 1 Make sure that a fully qualified domain name such as qatest com tw has been filled in 2 Make sure the user name with administrator access right to that domain 104 ...

Page 105: ...settings in step 2 domain name domain user name and the password When the following message appears after applying the settings in step 2 check the time zone settings Make sure the difference of your time and that of AD server is less than 5 minutes If the time difference is larger than 5 minutes you will not be able to add the domain member 105 ...

Page 106: ...f domain member you can view the list for domain users and local users in User Management 5 Go to Access Control in Network Share Management to configure the access control right of AD users for all available network shares 106 ...

Page 107: ...Using AD users to access services To access services like FTP Network Neighborhood Apple Talk with an AD user account add DomainName before the user name when logging in 107 ...

Page 108: ...and the user who has administrator access right for identification Note 1 Please notice that NAS and Windows 2000 2003 server must be in the same section or the system will show the following error message 2 Make sure that a domain name such as sub1 has been filled in 3 Make sure the user name with administrator access right to that domain 108 ...

Page 109: ...s after applying the settings in step 2 check the time zone settings Make sure the difference of your time and that of AD server is less than 5 minutes If the time difference is larger than 5 minutes you will not be able to add the domain member 3 Upon successful adding of domain member you can view the list for domain users and local users in User Management 109 ...

Page 110: ...n users to access services To access services like FTP Network Neighborhood Apple Talk with an domain user account add DomainName before the user name when logging in Note To join AD domain again set NAS as standalone server in Microsoft Networking section Make sure all domain users are removed in User Management before joining NAS to AD domain 110 ...

Page 111: ...figuration English Display Status Description Initializing Initializing disk Formatting Formatting disk Creating Creating RAID configuration Removing Removing RAID configuration Rebuilding Rebuilding RAID configuration Checking Error checking on hard disk or disk configuration in process 9 NAS will check disk automatically if it is shut down improperly English Display Status Description Ready The ...

Page 112: ...ly QNAP is not responsible for any data loss caused by delay in replacing failed disks in a RAID configuration by users intentionally or unintentionally 2 QNAP Systems Inc guarantees that all Disk On line Server NAS released have passed strict and complete QA test and can operate properly in normal condition QNAP offers conditional and limited maintenance for NAS within warranty period However QNA...