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Problem - Readynas pro rndp600e + netgear GS-Serie Switch
Recently, I've been in touch with Netgear's Customer support (NETGEAR Support case #14006630) about this problem : A PC, windows 7, linked to the NAS (5x1.5to) through a GS-605 Gigabit switch. As s...
You might try installing NetMeter from here : http://www.metal-machine.de/readerror/
It gives a "realtime" (more or less) display of the data transfers going on to/from your PC.
If the trace is reasonably flat, then the limiting rate of the connection has been reached and to increase it means changing something (e.g. disabling an anti-virus programme that's slowing stuff down, changing from a 100Mbps to a 1000Mbps NIC, enabling Jumbo frames etc).
If the trace is all up and down, then there are some settings that are causing extra control traffic up/down the link.
This can be mismatched settings (e.g. Flow Control, NIC drivers, inability to agree a DataRate between NIC and Switch etc).
To get further with this means changing one thing at a time and retesting.
I also found that a drive that's going bad can also give this, especially if you are trying to Read from a ReadyNAS Pro. Write speeds seem unaffected.
Do you have a drive with Reallocated Sectors ? This might be the cause of the problem.
I created a special test folder with multiple copies of the 1GB file that IOMeter creates and doing copy/paste between locations to check Read and Write rates. If you start with the simplest config and introduce changes then you can keep a track of what's going on. I also run it through a backup programme to check the data rates of read/write/compare sequences.
PS
I found that Enabling Flow Control on everything fixed my problems for a while. Now I have another duff 2TB Seagate that's causing problems, but that's going to be replaced soon so all might be OK again.
It gives a "realtime" (more or less) display of the data transfers going on to/from your PC.
If the trace is reasonably flat, then the limiting rate of the connection has been reached and to increase it means changing something (e.g. disabling an anti-virus programme that's slowing stuff down, changing from a 100Mbps to a 1000Mbps NIC, enabling Jumbo frames etc).
If the trace is all up and down, then there are some settings that are causing extra control traffic up/down the link.
This can be mismatched settings (e.g. Flow Control, NIC drivers, inability to agree a DataRate between NIC and Switch etc).
To get further with this means changing one thing at a time and retesting.
I also found that a drive that's going bad can also give this, especially if you are trying to Read from a ReadyNAS Pro. Write speeds seem unaffected.
Do you have a drive with Reallocated Sectors ? This might be the cause of the problem.
I created a special test folder with multiple copies of the 1GB file that IOMeter creates and doing copy/paste between locations to check Read and Write rates. If you start with the simplest config and introduce changes then you can keep a track of what's going on. I also run it through a backup programme to check the data rates of read/write/compare sequences.
PS
I found that Enabling Flow Control on everything fixed my problems for a while. Now I have another duff 2TB Seagate that's causing problems, but that's going to be replaced soon so all might be OK again.
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