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I'm usign a NAS from WD to store some files (http://www.wdc.com/de/products/Products.asp?DriveID=587).

I'd worked without problems for hours, but suddently some hours ago I can't copy any files to the disk anymore. If I try, the following error occurs:

You need permission to perform this action.

I don't really know why this happens, since I didn't changed anything. However if I look at the properties of various folders on the NAS, it says read-only. However if I try to change that, the same error occurs. Does anybody know how to solve this??

EDIT: If helpful, here the current available space:

Total amout of disc space:        957,439,436K
Available disc space:              98,843,144K
Available disc space (percent):      10%

Could this be a problem?

EDIT 2: I already tried to reboot both the computer and the NAS. Didn't improved the actual situation.

Currently I'm using Windows Vista Enterprise and I'm accessing the NAS over the local network.

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    Could you translate those into English? I think I know what it says, but I'd like to be sure.
    – MBraedley
    Nov 22, 2010 at 13:01
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    First of all, reboot NAS and the client computer. Then add info what OS/technology are you using to copy files.
    – mbq
    Nov 22, 2010 at 15:53
  • ok edited the questiuon Nov 22, 2010 at 16:45

1 Answer 1

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You need permission to perform this action.

Hmm... that sounds familiar.

Total amout of disc space:        957,439,436K
Available disc space:              98,843,144K
Available disc space (percent):      10%

If your NAS is one of the usual linux boxen, filling up to 90% may have the "root only" limit kicked in. This prevents any ordinary user from filling a HDD (partition) completely.

Filling a disk over ~90% has also very bad effects on performance. The data is scattered all over the disk - very many head movements are needed for both reading and writing => The performance lowers almost to a grinding halt. And NAS boxen have typically NO defragmentation.

Simple solution: Try to delete some data...

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