Dropping off Network / File copied successfully but in fact are corrupted

[chafouin]

   Our service is owning 4 NAS: 3x HD-H1.6TGL/R5 (firmware 1.12/2.0/2.0) and 1x TS-H2.0TGL/R5 (firmware 1.20)

I am experiencing several worrisome symptoms with one of them HD-H1.6TGL/R5 (fw 2.00)

- The first a one is that my terrastation just drops out of the network as I am transfering a large number of files.
Although annoying, this does not have an impact on the data safety since we can resume the upload once the NAS is rebooted and comes bak online

- The second one, and the most crucial, is that after tranfering files and the copy being successful (aka no error message shows up when I drag and drop the files from my harddisk to the NAS network location under windows XP AND the size of the original file is identical to the copied file on the NAS), some of the files on the NAS are actually corrupted. (ramdomly apparently)

For example I was copying some source code (*.h, *.cpp) to the NAS. Opening the copied files, some were fine, other were containing "nulnulnulnulnulnulnulnulnulnulnulnulnulnul" instead of my code....

Another occurence happened when saving a Doc file. Re-opening it, the file was empty/corrupted...

The problem here is that there are no symptoms indicating that the data are corrupted (nothing at transfer and the size of the file is good): for what I know most of my team work could be affected already: we won't know until we actually open each file to check if they are readable: this is a huge blow up for my organisation...

Is there a firmware correcting that issue or is it a symptom of some controller failing...
Should I be worried about my other NAS?
Is there a way to check the files without opening them?

Any suggestions are welcomed.

Thanks for your support,

[Dustrega]

chafouin,

 

   In lieu of this situation I would recommend going into the user interface of the NAS and performing an initialization in Maintenance. If that doesn't help the issue as far as the device dropping off the network have you tried accessing the device by IP address instead of NetBIOS name? This can be accomplished in Windows (XP or Vista) by accessing the run command and typing in "\\[IPAddressofNAS]" (minus quotes of course). As for the data corruption your best bet would be to run a RAID check in the Disk Management->RAID Setup section of the user interface. As for file checking there isn't a way to check the integrity of the file unless it it opened. Let us know if some or all of your issues have been answered here.