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Forum Discussion
ReadyNAS Pro + CISCO EPC3925 -> slow transfer speeds?
I have recently purchased Netgear ReadyNAS Pro 4 to use as an all-round storage. Everything is working fine, but I am getting disappointed with the transfer speeds. On CIFS or iSCSI reads/writes I only get something like 15-16 MB/s. I was hoping to achieve transfer rates at least in the 50-60 MB/s range so that it could be meaningfully used for VMs. I'm aware that it's not a very specific question but as I'm a newbie in this field... could someone point me please in the direction what might be wrong? What settings should I look at or change in order to get more acceptable speeds? Are there any known issues? My current setup is pretty basic and as follows.
Netgear ReadyNAS Pro 4 (populated with Hitachi Ultrastar 7K3000 2TB drives [2 pcs], running in X-RAID2 mode, latest firmware 4.2.24, Jumbo frames enabled in FrontView)
CISCO EPC3925 (cable broadband modem and gigabit router/switch)
ThinkPad X220 Laptop with Win8 Pro 64-bit (Intel 82579LM Gigabit Network Connection)
All devices are connected with Cat5e STP cables at Gigabit speed. There are no other network devices or traffic at the moment.
Thank you very much for your suggestions.
|----------------| |---------------| |---------------|
| ReadyNAS Pro 4 | ---- | Cisco EPC3925 | ---- | ThinkPad X220 |
|----------------| |---------------| |---------------|
Netgear ReadyNAS Pro 4 (populated with Hitachi Ultrastar 7K3000 2TB drives [2 pcs], running in X-RAID2 mode, latest firmware 4.2.24, Jumbo frames enabled in FrontView)
CISCO EPC3925 (cable broadband modem and gigabit router/switch)
ThinkPad X220 Laptop with Win8 Pro 64-bit (Intel 82579LM Gigabit Network Connection)
All devices are connected with Cat5e STP cables at Gigabit speed. There are no other network devices or traffic at the moment.
Thank you very much for your suggestions.
3 Replies
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- Does your PC and router/switch support Jumbo Frames and if so, have you enabled them on that? How does the performance compare when Jumbo Frames are disabled?
Are the drives still syncing (this is done after a factory default to setup the RAID syncing the drives sector by sector) or is the volume redundant? - Also, go into system->performance in frontview
Make sure "Enable disk write cache" and "Disable full data journaling" are checked. - Thank you for all your suggestions. I did my homework :), sifted through the forums here and did some tests. I've read through the very informative topic Struggling With Low Speeds < 15MBps Over Gigabit in this forum and tested my connections with the ping command as mentioned in there. I have updated drivers for the Intel Gigabit NIC and played with the settings. But everything seems to indicate that the Cisco router does not correctly relay jumbo packets. I've searched through its administration interface and found no mention of jumbo frames or any setting that might be linked to it. :( If someone had a clue how to enable jumbo packets on this router, let me know please. :)
The good news is that the performance significantly increased once I disabled jumbo packets on the ReadyNAS Pro. Now I get something like 60-70 MB/s transfer rates on reads/writes, which is a huge improvement and seems reasonable. Once again, thanks all contributors to this resourceful and informative forum.
P.S. Yes, Enable Write Cache and Disable Full Data Journaling options were enabled in Frontview.
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