The aim of an error detection technique is to enable the receiver of a message transmitted through a noisy (error-introducing) channel to determine whether the message has been corrupted. To do this, the transmitter constructs a value (called a checksum) that is a function of the message, and appends it to the message. The receiver can then use the same function to calculate the checksum of the received message and compare it with the appended checksum to see if the message was correctly received.

In digital electronic systems, information is represented in binary format (1's and 0's). When binary information is passed from one point to another, there is always some chance that a mistake can be made; a 1 interpreted as a 0 or a 0 taken to be a 1. This can be caused by media defects, electronic noise, component failures, poor connections, deterioration due to age, and other factors. When a bit is mistakenly interpreted, a bit error has occurred.

Please refer a procedure below, 
Step 1: Old NAS unit must be powered off.
Step 2: Move out the HDD caddy.
Step 3: New NAS unit set factory default once
Step 4: Insert HDD caddy with new NAS unit.
Step 5: Power on new NAS unit.

The solution is pretty easy using the registry.
On Desktop screen, click "Start"-----> "Run"------> input "regedit" will show registed list. Find the key: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Lsa\LMCompatibilityLevel 
controls the security level mandated or allowed for logins. In Vista it defaults to 0x3, which means "NTLMv2 only". This is not supported by Samba server. The fix is to change it to 0x1, which means "use NTLMv2 if available, or older versions if not.", and then reboot. Samba shares will work just fine.

The LCD panel constantly displays the IP address, Fan speed, System temperature, System hostname, System memory size, CPU model and version of current hardware. It also shows warning messages in real-time while detecting the hard drives which are been damaged.

Currently no limit is set.

Yes, Orion NAS series unit can support.

Yes, Orion NAS series supports FTP protocol.

NAS offers four languages for localized web pages, simultaneously NAS supports the following code page for file name and administration usage: English, Japanese, Traditional Chinese and Simplified Chinese.

NAS unit supports standard web browsers. Most popular web browsers which the NAS supports below: Microsoft Internet Explorer 6.0 or above, Macintosh Safari 1.0 or above, Firefox

Yes. NAS provides the independent RAID level, which means that you can create several levels by different RAID at the same time in the NAS unit.

Yes, NAS cooperates mobile racks to provide the hot-swap and other related functions for all hard drives.

Yes, Orion NAS series can integrate with UPS power management. For detail model inquiry, please refer user manual.

Since “Orion NAS” is based on LINUX operating system, it will not cause extensive damage of system by virus. Data on Orion NAS could be affected by virus and on any possibility from the client. The best way to solve the problem is to execute and update the anti-virus program regularly when client scans for viruses to the Orion NAS.

Orion NAS series supports over 2GB per file. But Microsoft windows 98, MAC OS 8.X and MAC OS 9.X system file system had limited by itself.

Yes, Orion NAS series file system is supported by Linux kernel (xfs file system), so file system support capacity is over 2TB.

When select the domain or ADS level on Orion, the NAS will be a domain member (Not PDC or BDC). It can catch all of domain user's name in Domain and add into NAS self, then all of users in Domain could use same account to access NAS. The difference between ADS and Domain level is your Domain type that will be joined. If the Domain type that will be joined is ADS, you will get all of domain user's name in ADS tree when you select ADS level. If you select Domain level, you get the user's account in 'Only' Domain that you join. For client, join ADS level or Domain level are same, if the user is in same domain. However, if the user in other domain in ADS, he/his could not access NAS data when use Domain level.

There are 3 methods to turning NAS off.
 1. Click the shutdown button on the management page.
 2. Turn it off at the LCD panel function section.
 3. Press the power button to turn it off, please beware that.
When you press once the power button to turn NAS off that will automatic dispose closing machine procedure that needs the time approximately is 10 seconds, otherwise the power button is pressed over 4 second, the system will recognize it as non-normal switch off. When you turn it on the next time, it will check the file system. The function will check the needs time around 30 min.

1. LAN cable must be connected before you boot Orion NAS, you can’t wait until the starting process end then to connect the cable.
2. Make sure you have connected into the Internet, you can judge it by noticing on the Internet by showing whether or not the light is on or not. If the LAN light disappears, that means that you have not connected to the Internet yet. Please check RJ-45 cables, Switch machine.
3. If you do not have the DHCP server, please power on the Orion NAS and then setting manual IP in front LCD panel. (Please refer user manual)
4. If you have got the IP on your DHCP server network condition, the LCD panel would not show IP not available, please check it whether DHCP expired.

1. If it’s the PC, please use Internet Explorer 6.0 version or above, for Macintosh, please use Safari 1.0 version or above.
2. If you have enabled the proxy in your browser, please disable it first.
3. If messages shows that “Another administrator is logging in now” that means there’s another person logging in, or did not log out properly, to solve that, add “logout” after your address (for example: 192.168.1.105/logout) then you can login or log out normally
4. If messages show “Sorry, you have no right to use this system. Please login the system again from the following link.” that means you type in a wrong password, please confirm your password.
5. Remove any anti-virus program

1. If NAS realizes there is a hard desk failed the beep will be alerted, and the light of the disk tray will show a red signal (normally it’s green).
2. Prepare the same or more capacity hard disk, move out the failed HDD out, insert the new HDD instead, the computer won’t need to be powered off during the process
Notice: When HDD failed system will noisily, if you want to disable the beep, please going to the management page, go to System Setup, after this you will be able to see the Event Notification. Please disable the BEEP status is off .

It is a few possibly of situation encountered gave the alarm as soon as when NAS was running, and displays there error message to system log.
1. CPU over heat.
2. CPU fan out of order.
3. Disk fail.
4. Volume fail