HD write bottleneck?

[Belthazor]

Dear all,

I have currently FreeNAS 8.3 running on my NAS (specs: http://tweakers.net/gallery/1082#tab:inventaris click on NAS)
I have installed the following software sabnzbd, sickbeard, couchpotato and spotweb.
When i download something from usenet i get a 19,8 MB/s max download (it's fluctuate between 17 - 19). on my 200Mbit line. However on my own PC (an oldtimer see specs and click silent pc) which runs on Linux Mint i get the full 200Mbit ~24+ MB/sec steady.
This results in my belief that the bottleneck of the write lies within my NAS. Is any of my hardware too slow to get above the 20MB/sec write? Any test i can do?
I have read the forums on this problem, but things often get a bit too technical or relates to a other problem. Hope anyone can help

Thanks

 

[dlavigne]

Which NIC driver is the system using (from ifconfig)?

 

[Belthazor]

ifconfig says:

re0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=209b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_MAGIC>
ether 90:2b:34:35:86:6c
inet 192.168.1.13 netmask 0xffffff00 broadcast 192.168.1.255
media: Ethernet autoselect (1000baseT <full-duplex>)
status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
options=3<RXCSUM,TXCSUM>
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x4
inet6 ::1 prefixlen 128
inet 127.0.0.1 netmask 0xff000000
nd6 options=3<PERFORMNUD,ACCEPT_RTADV>

 

[dlavigne]

re0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500

Realtek is about the crappiest NIC. If network performance is important to you, consider purchasing an Intel NIC for the system.

 

[joeschmuck]

It doesn't look like it's slowing down a lot compared to your other system. Stuff you haven't mentioned is the configuration of your hardware for your FreeNAS system. It could just be that configuration that is causing the slowdown.

 

[gpsguy]

Have you run smart tests on your disks?

. I would be concerned about the surveillance drive. While they are generally rated for 24x7 use, the way they handle errors might not be what you want.


Sent from my phone

 

[Belthazor]

I have configure the harddiskcontroller in IT mode, and use a ZFS RaidZ file system

when i had a 120mbit connection, my server and my other system were exactly the same in download speed (so internet speed was bottleneck)
when i upgraded to 200mbit my other system downloads at 200mbit, while my NAS can't get above 160mbit, which i concluded there is a different bottleneck with my NAS (f.e. disks, cpu, configuration etc.)

 

[joeschmuck]

Have you run smart tests on your disks?

. I would be concerned about the surveillance drive. While they are generally rated for 24x7 use, the way they handle errors might not be what you want.


Sent from my phone

Did I miss something? I didn't see any mention of drives in the thread. But I do agree, A/V drives do virtually no error correction because if there is an error in video or audio, who generally cares it the thought and you are likely to never notice the error.