Hi everyone,
I have a quick question, i just purchased a gigabit switch for my home

(NETGEAR GS108 10/100/1000Mbps ProSafe Gigabit Ethernet Desktop Switch)

I have all cat6 cables and all my devices are at 1000/full. When I copy a 2GB file from my VM CentOS server to my NAS, I'm getting around 202135 kbits which equates to 24MB's.

Is that speed right? doesn't look right to me. Can someone please chime in?

Thanks.

Try it with a patch cable and report back.

You don't really need a crossover since almost every nic can auto correct for cable. Only one side needs to be newer.

hello jefro, thanks for the reply. I actually purchased all UTP Cat6 Patch cables. THe only crossover cable i have is from my Verizon FIOS router to my gigabit switch but all my internal network is Cat6 1000/full.

What sustained data transfer rate is the HDD capable of? It could be that the bottleneck is the HDD not the network. If you want to test the network, safer to transfer from memory to memory rather than HDD to HDD.

Thanks for the reply catkin, my ESXi server has a 160 Hitachi 160GB drive with the following specs:

Model: HDS721616PLA380 (0A32728)
7200 RPM
SATA 3.0Gb/s
8MB Cache

My NAS is a Synology 211j enclosure with 2x2TB RAID 1 drives, drive specs below:

Brand: Western Digital
Model: WD20EARS
SATA 3.0Gb/s
64MB Cache

Also, how would i go about testing from memory to memory?

On the NAS client (IDK about the NAS device), you could set up a file system in memory, for example add this to /etc/fstab:
There's a lot of good information about testing Gigabit Ethernet at Tom's Hardware (for Windows but the hardware and network parts are relevant). Seems like every one of the components can be the bottleneck -- HDDs, CPUs, NIC drivers, NICs, cables, switch -- so the art of testing is identifying where the bottleneck is. For example, here it was the Linux Realtek drivers which were the bottleneck and here it was the NAS internals.

I said you don't need a crossover cable. Use a patch and re-test.

Seconded, back-to-back em and eliminate the switch as the source of the problem. Also verify that your cat6 cables are good as it is possible for GE to negotiate 1000Mbps/Full with a pair out.