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I have D-Link DNS-323, that has two HDD's. I have been using it for a year without any problems. I didn't use that as a RAID, just simple setup with two Drive letters mapped to two HDD's.
About two weeks ago it started acting weired. I noticed that sometimes connection to my drives is lost. I noticed that while copying larger amount of data. Suddenly it said something like "Network Drive no longer exists". File explorer does not show file tree for that particular map drive. If I close File Explorer and reopen again, it is available again. I try to copy larger file again, it works for 3-4 minutes and drops again. I have restarted PC, same issue. I have restarted NAS, same issue. I have even upgraded firmware to the latest 1.05 version, same issue. I thought HDD might be faulty, so I started copying into second HDD inside of NAS, same issue.
So it does not look like HDD can be blaimed. What was even more puzzling, it was that at the same time I was streaming audio from HDD2 and that didn't stop, while file transfer stopped and File Explorer lost connection to the drive.
Any ideas?
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Intermittent "The network drive no longer exists" messages that occur when copying large amounts of data are usually caused by network problems.
The tcp/ip protocols were designed to be self healing and to detect transmission errors and to "correct" them by requesting a retransmit - however on a network with high levels of errors, this causes an "avalanche type" of failure - with light traffic (small amounts of data) the errors occur and the retransmits correct the problem, and the file might take an extra second or two, but as the traffic loads increase, so do the errors and the retransmits, the retransmits push the traffic levels higher, which pushes the errors counts higher and the cycle repeats until the level of errors detected causes the transfer to fail. The traffic stops and you can reconnect - you restart the transfer and boom the entire process repeats.
You have not told us anything about your network - whether it's wired or wireless, etc. - but that's most likely where your problem lies.
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Sorry for not telling that. It is wired. NAS is connected to the switch, computer I was transferring file to , was also connected to the same switch. I tried to copy between two PC's connected via the same switch, it works without problems. So it is only a problem when I transfer to and from NAS.
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How did you connect? Using explorer? Try this instead.
1) Right click on the My Computer icon.
2) Click on Map network drive
3) Map the drive using the IP address -- Do not browse for it or use the host name.
4) If you have a loging and password, click the Connect with a different user name link and enter the DNS user information.
I'm not ruling out a network issue, I agree with fordem that it is definately a potential source of the problem, however, I know from personal experience that this issue may also arise from Windows.
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So - it's a wired network - 10 mbit? 100 mbit? 1000 mbit?
What about the cables - are they correctly wired?
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It is connected to Gigabit switch with original cable, therefore correctly wired. It was working almost a year properly. PC conected using a cable that I used for few years. And since same PC works fine when connected to another PC, I can rule out that cable as potential cause of the problem. It just started acting weired lately. The only think I can mention that time wise coinside with this that I had an unexpected break in electricity supply. Can't say as it started at the same time (not using it every day), but it is possible.
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bq041 wrote:
How did you connect? Using explorer? Try this instead.
1) Right click on the My Computer icon.
2) Click on Map network drive
3) Map the drive using the IP address -- Do not browse for it or use the host name.
4) If you have a loging and password, click the Connect with a different user name link and enter the DNS user information.
I'm not ruling out a network issue, I agree with fordem that it is definately a potential source of the problem, however, I know from personal experience that this issue may also arise from Windows.
I will need to test that once I get home, not sure how can I map drive using IP address? I have two HDD inside of NAS, currently mapped to two drive letters: NAS has one IP adress??
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bq041 wrote:
How did you connect? Using explorer? Try this instead.
1) Right click on the My Computer icon.
2) Click on Map network drive
3) Map the drive using the IP address -- Do not browse for it or use the host name.
4) If you have a loging and password, click the Connect with a different user name link and enter the DNS user information.
I'm not ruling out a network issue, I agree with fordem that it is definately a potential source of the problem, however, I know from personal experience that this issue may also arise from Windows.
Have done this mapping via IP, however same issue appears. Will try to change cable, as well as Switch connection to see if it helps. Any other ideas on what can I try?
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I have the same problem with one wired computer and one wireless laptop.
I use the NAS as a source for my music, so i have foobar configured with the NAS as its music root. But after a few seconds the connection is lost and foobar skips to the next song.
" Decoding failure at 0:21.030 (Network not reachable):"
My laptop has been doing this since the beginning, but my PC is doing this only recently. I tried mapping the network drive via the name of the NAS and via its IP, both give problems.
The strange thing is that on my girlfriend laptop there is no such thing.
edit: a NAS reboot is working for now...
Last edited by Betse (2008-11-30 11:21:42)
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