Hi all,

Have a Gigabit switch installed to increase speed of file transfers between PC and ex485 home server. All worked for first few weeks and had speeds of 60Mb/s for file transfers, now I get same speeds when transferring files for the first 1Gb of data, then it slows to 16Mb/s for remainder of transfer?

Any ideas as to why this has occurred and potential solutions would be appreciated.

Sean

How are you measuring the performance? How full is your server? You're running WHS 2011 on the server?

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Alex Kuretz
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Hi Yakuza,

Measuring by the Windows 7 transfer box that comes up when I move a file, it clearly shows a 60Mb/s transfer for the first Gb of data each and every time, then slows back to non Gigabit speeds regardless of amount of data being moved. I am using WHS 2008 with Power Pack 3, and there is 4Tb of space on the storage pool. Frustrating mainly because when first installed the switch, the speed maintained at 60Mb/s for any amount of data, and something must have changed, stumped as to what has changed through......

Would appreciate any ideas people can throw at this issue above?

First of all, it sounds as if you are running WHS v1, not WHS 2011, so this is really in the wrong area, but...

Since you are running WHS v1, it could be that you have folder duplication turned on for the destination of the copy. If so, you might find that the copy starts out fast, but then later the duplication process kicks in and slows things down.

But even without duplication, the behavior you are seeing can be the result of a slow(ish) hard disk. The first chunk of data might be just stored in RAM cache on the server and when the system runs out of cache memory, it has to actually wait for the disk writes to complete. What kind of hard disk is the destination of the copy on the server? Note that with WHS v1, determining the actual destination can be kind of tricky because of the way drives are pooled as one big destination...