Very poor read speed

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Hi all,

 

I'm having some problems with very low read speeds from my unRAID setup - when copying to my cache drive, the speed is great, around 70mbyte/sec. But when I read from the array the speed is only 3-4mbyte/sec, even when only copying 1 file at a time. Parity check speed also seems reasonable at 45mb/sec.

 

My setup is as in my signature, the drives are connected as follows:

 

Parity - WD EARS 2TB with alignment jumper - Connected to motherboard SATA

Cache - 500GB Seagate 7200.12 - Connected to motherboard SATA

Rest of the drives are split across the motherboard and a Raidcore PCI-X card I have installed (on a PCI-X slot)

 

I am using a vanilla install of 5.0-beta11

 

Thanks in advance for any help!

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For some reason changing the network cable fixed it for a few minutes, then the system "froze" for a couple of minutes (I couldnt access it at all) and then came back with the same slow speeds ...

 

Any ideas?

[SBB]

ARGH this makes no sense:

 

I tried with a direct cable connection between my PC and unraid server ... full speed.

Using switch, slow speed. So I figured there must be a problem with the switch ... so I ran iperf between unraid and my PC over the switch and these were the results:

 

 

Anyone got any ideas, this problem has totally got me stumped!

[sonata31380]

I also try to use iperf

When I execute the command:

 

iperf-c hcsrv1

 

I get the message:

connect failed: Connection refused

[thejinx0r]

You also have to do "iperf -s" on the unraid server.

[sonata31380]

Thank You