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Network Storage Server: VIA NSD7800 (angle view)
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Network Storage Server: VIA NSD7800

D-Link DNS-321 2-Bay Network Attached Storage

D-Link DNS-321 2-Bay Network Attached Storage

The D-Link 2-Bay Network Storage Enclosure (DNS-321) is the perfect way to store, share, and safeguard your documents, music, videos, and photos. With the D-Link tool-less installation, easily insert up to two SATA drives without any tools or attaching any cables. Additionally, the built-in UPnP┢ AV media server enables streaming of digital content to compatible network media players (such as those found in the D-Link MediaLounge product line) as well as popular media player applications used in computers.

The availability of four different hard drive modes (Standard, JBOD, RAID 0, and RAID 1) allows you to choose the configuration best suited for your needs. Standard mode creates two separately accessible hard drives. JBOD combines both hard drives into one for maximum space efficiency. RAID 0 combines all drives in a â??stripedâ?TM configuration, splitting data evenly across the hard disk drives to provide the highest performance, while RAID 1 causes the drives to mirror each other, providing maximum protection. If one drive fails while configured as RAID 1, the unaffected drive will continue to function as a single drive until the failed drive is replaced.

With the included feature-rich Memeo software, you can create schedules and rules including real-time full or incremental backups. The Web-based configuration software allows users to establish storage quotas for specific users and groups. The DNS-321 can automatically back up your data regardless of the Operating System (OS) of your computer (Windows®, Mac®, or Linux®). The DNS-321 also features a built-in FTP server2 to access files through the Internet.

With its sleek design and quiet cooling fans, the DNS-321 can be easily placed on your desk at home or in the office. Utilizing SATA hard drives and gigabit connectivity, the 2-Bay Network Storage Enclosure (DNS-321) is a high performance, cost-effective solution for your home or small office data storage needs.

  • Store digital content from multiple computers into a central location
  • Easily insert up to two 3.5″ SATA drives without any tools or attaching any cables
  • Stream music, photos and videos to compatible UPnP AV-enabled media players
  • Access stored data away from a home with the built-in FTP server
  • Supports 4 different hard drive modes (standard, JBOD, RAID 0 and RAID 1)

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Question by Paul B: I have a D link DIR615 N router. How can I set up NAS using this router and a western digital hard drive?
I have not bought the hard drive yet so I’m open to suggestions but how do you get NAS (network attached storage) working on a regular router that’s connected to a cable modem and feeding a windows machine with multiple users?

Best answer:

Answer by GoodToGo
The way a NAS works is just like a computer. You can think of it as a harddrive enclosure with RAID controller and a simple OS. If your router is running on DHCP which dynamically assign IP address to each device connects to it, then there is really not much more for you to setup for the NAS. Setting up access on a NAS will be a totally different issue as it depends on your NAS and the file system you will be on.

So here’s topology of your network structure:

cable modem — router — (NAS, PC1, PC2, PC_n)

On your Windows machines you will be able to share the files from your NAS but mapping it through the IP address of the NAS.

Add your own answer in the comments!

Wooww, nice product! I want to share this product!

What customers say about D-Link DNS-321 2-Bay Network Attached Storage?

  1. 154 of 154 people found the following review helpful
    4.0 out of 5 stars
    One of the better home NAS devices, October 23, 2008
    smoove (Austin, TX USA) –

    This review is from: D-Link DNS-321 2-Bay Network Attached Storage (Personal Computers)

    I’ve been pleased with the reliability and performance of the DNS-321. I was hoping the Gigabit transfer speeds would be significantly faster, but it seems to top out at 14-16 MBps (MegaBytes per sec). This is on the upper end of most consumer NAS boxes, including D-Link’s tried & true DNS-323.

    . Runs cool & quiet.
    . Spins down the HD when idle to conserve power.
    . Rock-solid operation (no reboots necessary in the month I’ve had it).

    . Larger drives (1TB and up) can get “stuck” at 94% during the format phase, but eventually it will complete.
    . User permissions setup is clunky. This is common among consumer-level NAS boxes though.
    . User access permissions are cleared on reboot :(
    . No firmware update yet (v1.0). D-Link tech support says they’ve fixed most of the problems above and are testing the new firmware for public release. The cons are relatively minor to me, and once fixed in firmware, this will be a 5-star product.

    Opt for a low-power (and low-heat) HD to use in an external enclosure. Transfer rates on this generation of NAS will never approach the max throughput of HDs, so using a fast 7200rpm drive is a waste of money and power. Extra heat from the faster drives may cause issues down the road. Recommended low-power models are the Western Digital GreenPower and Samsung EcoGreen.

    UPDATE 11/30/2008: D-Link has released firmware 1.01 which fixes the issue with access permissions being cleared on reboot. It also claims to support 1.5 TB hard drives.

    UPDATE 5/8/2009: User account access control has an issue in all firmware versions, from the original 1.0 release to the latest beta. Basically the setting to allow All users to access a share disappears. Resetting to defaults sometimes brings it back, but shares configured to allow All users don’t work properly. Weird issues with the All checkbox and shares disappearing are very frustrating. Dlink tech support has been aware of this for 4-6 months but no fix is in sight.

    Final Update: D-Link finally fixed the issue with All Users permissions in firmware 1.03. There are some lingering issues, some minor and some not so minor, but D-Link hasn’t released a firmware in well over a year. Looks like D-Link has written off this product.

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  2. 163 of 171 people found the following review helpful
    1.0 out of 5 stars
    5 stars for nice features, overall 0 stars for corrupting my data, March 12, 2009

    This review is from: D-Link DNS-321 2-Bay Network Attached Storage (Personal Computers)

    Well, it was working fine for the features I was using. Immediately updated to their latest firmware release. Put 2 1TB drives in it, all the backup options (rebuild drive, etc.) seemed fine as I played around with swapping drives out. Then I tried to copy all of my current data over to this NAS box. After about a full day of copying (I have several hundred gigs of files) I went to check the status of the backup.

    The backup had completed… HOWEVER, since I had turned on data validation (rereads the destination and source files and compares after the backup) it noted that out of the 1000s of files I had backed up that 12 of them were “not equivalent to the source files”.

    I took down the names of the files and then did a hex dump compare of the old and new files. To my surprise the files that were copied onto the NAS box had *exactly* 76 bytes of zero in very specific relative offsets in each file. It was always at hex offsets with the last 3 nibbles of the file offset being in the range of xfb4-xfff that were all zero, in all of the “corrupted” files.

    Puzzled, I did some Google searching and found that there was a Linux kernel bug found at the end of 2006 that just happens to exactly match this behavior! The kernel was losing the “dirty bits” (modified memory page indicators) when it was writing to ext2 or ext3 file systems (this box uses ext2). This only happened on certain “chunks” (76 bytes for the Linux case) if they were the 76 bytes that fall at the end of a 4k memory page boundary (the last 76 bytes of a 4k page are… you guessed it!! bytes xfb4-xfff).

    The data I was transferring was from a Windows XP machine and this NAS box is internally running.. yep, LINUX! I believe they likely have a version of kernel running on this thing that was silently corrupting my data, as all the issues seem to exactly match my conditions.

    That is the WORST kind of data corruption (“silent”) because there were NO error indications at ALL except for when it had done the final recompare, which good thing I had turned that on or I would have NEVER known my data was being corrupted as it was copied to this NAS box!

    I notified the D-Link tech support people about this issue, and they responded back saying that they are looking into what is causing the problem (think I gave them a good enough head’s up on this one!)

    I promptly returned the box to get my money back and am now running w/ a RAID 1 configuration in my main PC instead of having an external NAS box.

    Support notes – I stayed on the phone for the D-Link tech support number for a good 20+ minutes, all I got was the answering service kept repeating “due to a large volume of calls, … ” so I just hung up and emailed them instead. Took them about a week to get back to me (but they did).

    Other gripes about the box – the little levers to remove the drives were REALLY hard to use, my thumb got sore after swapping the drives a couple times for doing the failed drive testing.

    This review is specifically about the DNS-321 as that was the only one I tested, however the DNS-323 is VERY similar to this box (just basically added a print server), so I can’t say if that one is any better or does the same corruption as this one does (it’s quite possible).

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  3. 33 of 35 people found the following review helpful
    1.0 out of 5 stars
    Small business? stay away from this one, March 8, 2009

    Amazon Verified Purchase(What’s this?)
    This review is from: D-Link DNS-321 2-Bay Network Attached Storage (Personal Computers)

    I bought this to test as an inexpensive file server in a small business, so I cannot comment about the UPnP server, FTP server, etc.

    The unit ships with firmware v1.00, but that firmware has problems (RAID, large drive, fan settings, etc.) that are well documented, but firmware v1.01 was released in October 2008, and was supposed to fix those issues.

    I immediately updated the firmware to v1.01 and began to test the RAID for reliability, etc. It turns out that v1.01 broke some important items for me – most notibly the permissions. As soon as you create a single user, the ability to select “All accounts” disappears. Further, every time you reboot the unit, you will lose all of the permissions that you set up. This is a bug, and D-Link is well aware of it since early November 2008 – you can read about it on their forums. It is now early March 2009, and they have not released an updated firmware.

    I have it turned off and sitting on the shelf waiting for a new version of the firmware. If they fix it, this could turn out to be a nice unit, but until then, stay away if you want a reliable file server with RAID for a small business.

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