1)I've got it setup as 1 volume, so when i put videos up i'm not sure which array they are getting stored on.
2) No havent tried that, i have 2 clients so i'm pretty sure it's not the clients but i will try it

It only seems to happen on shows that are less than 25 mins and files that are in vob format. I dont think it has happened on other file types (avi).

Also openfiler says that all of the hard drives are fine. I'm not sure of any other logs that would show issues with hard drives

Thanks for your help