I thought I keep you updated- most of the problems above were sorted eventually after tweaking the GPOs, some settings on the HP clients and installed a few firmware updates for the RAID controllers and the HDDs; but I ogt another problem with these beasts and it's when we have 20 odd users/ students logged in and they try to copy a small folder with 5 documents including an access database, the whole folder is only about 450 KB so not an issue when transferring the folder using the fat clients by the same students as we had the move classroom today- so go to the point: the clients freeze all at the same time, the question now is there a known problem with transferring a database file from a shared area into the users home folder. By the way the shared area and home folders are both locate on the same NAS server.
Any advice or help is appreciated- thanks in advance.
What Specification is the NAS server?
Can I just check a couple of things. From what you've said, I think you're saying that it's OK with a small number of clients but it starts to get slow as you up the number of clients? If that's the case, then I suspect that the software on the client is probably basically OK and it's something to do with the server or the network.
You now need to do some step by step troubleshooting (and that's always hard when everything seems to be falling to pieces!)
If you look at performance monitor on the server, how much CPU is being used when it starts to go slowly? You've got 8 cores so you ought to be seeing all 8 in use - if something weird is going on then you might be seeing 1 core running at near 100% and the rest doing nothing (don't expect that!). If you're seeing all 8 cores looking busy then that suggests that the server is not up to the job - add another one (although I appreciate that's a shed load of money you might not have)
Have a look at the network bandwidth into the server - add a trace for network interface bytes received per second and bytes sent per second; do it for each card. Given that you've got a 100Mbit switch between the server and clients, you're not going to see more than 100Mbit but you might be seeing close to that. If you're seeing 50-60Mbit then that suggests that the network is saturated - you need to put in a gigabit switch.
Back in performance monitor, look at Physical Disc and check the average disk queue length. This should be tiny (less than 1 normally; if it gets to 10 then the world is about to end :-)) I'd be surprised if this is the problem but you haven't said anything about the discs so it's conceivable that they're too slow.
You can also look at RAM used on the server but this is often confusing - Windows will use all available RAM for caching etc so just because you see all RAM in use doesn't mean you need more. (If it's 32 bit Windows then you can't have more than 4Gb; if it's 64 bit then you can put in loads but it may not help)
Hope that helps but you really need some metrics to indicate what's going wrong. Good luck!
Hi guys- just to let you all know that the ightmare is now over and everything is running smoothly and as it should; we had to scrap win 2008 server enterprise 64bit and re-installed win 2003 R2 server and now all is much better, faster and very stable too.
Thanks for your help.
Last edited by armadillo; 20th January 2009 at 10:58 PM.
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