SBS 2003 R2 (32 Bit) - Slow File Transfers to and from Clients
We have a Dell PowerEdge 1600SC file server (fitted with a single Xeon 2.8 CPU) at the centre of our small business / home network. The server has an Adaptec SATA RAID card fitted, and has five hard drives running in RAID 5EE configuration. The server also has an LTO 2 tape drive for backup, currently using Retrospect 6.6. Antivirus is the current version of Kaspersky Small Office Security.
I write a lot of technical reports and technical articles in MS Word, and also take a lot of photographs, which are stored in their camera raw format. I have recently archived a lot of older data, so current data on the server is about 200 GB total.
I have installed a Gigabit wired Ethernet network throughout the house and office, which consistently reports GB/s connections.
So far so good.
Backup speeds on the server using the tape drive are up to around 2.5 GB a minute. Copying a 2GB folder of camera raw files from one partition to another takes about 25 seconds, so clearly there is no problem with data read or write speed. HOWEVER, if I were to copy the same 2 GB folder to one of the clients this would take several minutes. (Windows 7 / 64 reports a maximum of around 22 MB/s, dropping to about 14 MB/s by the end of the transfer). Copying the same files back takes even longer, with Windows 7 reporting a speed of around 5 MB/s.
As you might expect, reading and writing files form this server is painfully slow, whilst our accounts programme also struggles.
Meanwhile, copying files from one client to another is much faster, at between 80 and 120 MB/s, so clearly the network is not at fault.
Does anyone have any ideas where the problem could be? I am tempted to update the server, which I know is getting a bit long in the tooth, but I would rather find out where the problem is first.
Any help gratefully received!
Raid configured correctly
Check your raid setup is not configured for read priority as this will cause the symptoms you describe. Boot into the raid controller and set it to 50/50 for read and write priority.