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#1 2009-11-16 12:15:31

nickotar
Member
Registered: 2008-11-30
Posts: 16

Data consistency problem : help needed

Hi all,

I've been using DNS323 with 2 HDD (Samsung Spinpoint F1, 1 TB) for months now without any problem. My drives are configured as two separate drives. I ran firmware 1.04, and I'm running fun_plug

For a few days now I'm experiencing strange data consistency problems. For example :
- when I copy big files (> 100 MB) from a Windows PC, both with samba share or through sftp, the file get corrupted on the NAS : it has same size but wrong checksum although I got no error while transferring
- same problem in the other way, when I read big files from the NAS and copy them to the PC
- when I test the checksum of such big files directly on the NAS (md5sum command through telnet) I get random results : the same command on the same file changes on subsequent checks
- direct download of files from the internet to the NAS are frequently corrupted too
- the checksum inconsistency appears even on old files that were originally written consistently.

I have no explanation of this : the problem started to appear without any changes made on the NAS. I made a firmware update to try to solve this (from 1.04 to 1.06), but it didn't.

It should not be a disk corruption problem as it began to appear simultaneously on both drives.

This is making my NAS nearly unusable as I can't trust on it. Only small files don't seem to be affected, though I can't be sure about that either.

I can't find what can cause such a behaviour.
Could it be a memory problem ? How could I check the RAM ?
What else could it be ?

Any help would be greatly appreciated.
Nickotar

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#2 2009-12-21 13:02:37

nickotar
Member
Registered: 2008-11-30
Posts: 16

Re: Data consistency problem : help needed

Well, after many testing, I decided to buy a new DNS-323. Putting my drives into the new one completely solved my problems.
The problem was indeed hardware related. I configured both NAS with same firmware and exactly same configuration and the old one was still corrupting data.
Strange behaviour as it was not a complete disfunction, and as it seems I'm the only one facing this type of problem.
Hope that the new one will last very much longer.

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#3 2010-03-25 00:29:15

mistah
New member
Registered: 2010-03-25
Posts: 3

Re: Data consistency problem : help needed

Odd. I just got my DNS-323 (used) with 2 x WD 500 HD's.. and recently started downloading some large ISO's from torrent (using transmission and FFP)..  no errors and 100% complete downloads, but once I copy them over to my PC and trying to unzip 'em.. corrupted files.  I must have download 3-4 ISO's so far, and each of them is corrupt.

I noticed that my "flow control" was disabled on my network card, so I just enabled it.. anyone think that would be the problem?

sorry to bump an old thread!

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#4 2010-03-25 08:40:43

oxygen
Member
Registered: 2008-03-01
Posts: 320
Website

Re: Data consistency problem : help needed

mistah wrote:

I noticed that my "flow control" was disabled on my network card, so I just enabled it.. anyone think that would be the problem?

No.

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