Hi Experts. I have a scenario here that is quite a puzzle and I'm offering 500 points straight up as anyone with the solution will definitely earn all 500.
Situation: I have an almost new HP Proliant ML370 running as a file server at location A. It was installed about 2 months ago and all has been well until last week.
I have a remote office (location B) about 300 metres away that is linked to location A by a 20Mb alvarion wireless link.
Last week the issue started. Users in location B accessing the file server at location A are experiencing alot of latency (there is another server at location B where most of their stuff is but they do access some shared files at location A also). For example copying a 20 Mb file from my HP Proliant to a machine in location B can take 4-5 mins. Copying the same 20 Mb file to a PC at location A from HP server only takes 5 seconds.
Location A has about 60 users, location B about 30 users.
What I've said to far all indicates 'oh you've got a problem with your wireless link' between locations. This however isnt the case as the guys who installed the link have come in, tested it and all is fine (throughput testing shows all 20Mbs available). Also, to prove this more if I copy a 20Mb file from an old file server (currently functioning as a DC) located at location A - to a machine located at location B it copies in about 30 seconds, what I'd expect over the link.
Also, if I plug a laptop straight into wireless link and both locations I get perfect speeds between the 2 so I cant see the wireless link being the bottleneck. That then points to the new server as the bottleneck...
...However users on the 100Mbs LAN at location A get perfect speeds when connecting to the Proliant server (the server incidently has 2 X Gb ethernet ports and is operating at 1Gbs). My PC for example is at location A and I've just copied a 120 Mb file to my machine from the server in 15 seconds, again, what I'd expect.
I've troubleshooted this over and over, rebooted every switch, every machine, every server, virus defs on machines are upto date. I've replaced the switch at the remote location B.