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ReadyNas 1100 5MB/s transfer speed
Hi! I've recentley inherited a readynas 1100. I reset everything to factory defaults and installed 2 x 2TB WD Green drives. The disks are in RAID 1. I went through the wizard and pretty much...
Hi, Thanks for the response!
I shall try changing the MTU - as for the firmware I'm not able to access it at the moment but I had it updated to latest one avalible. I can let you know which that is later today!
thanks again,
Matt.
It looks like you are connected at 100 mb/s. Please check the network tab to make sure that you are connected at Gb/s
I am assuming that you are on OS6 vs OS4
Good Luck
Cliff_MI wrote:
It looks like you are connected at 100 mb/s.
I don't see what you are basing that conclusion on. Expected performance with 100 mbit ehternet would be about 10 MB/s, not 5-6.
But the network link speed should be checked. If it is 100 mbit, the MTU should certainly be 1500.
Cliff_MI wrote:
I am assuming that you are on OS6...
No, the 1100 is an old sparc v1 product - it should be running 4.1.x firmware.
BTW drive size is limited to 2 TB.
My understanding of an MTU is very poor - I understand that the MTu is the size of the packet? so a higehr MTu means a lower packet count made of bigger packets - I could be way off.
Would you mind explaining why a larger MTU means faster speeds? would the data still be trasnmitted at the same speed even though the per packet size was larger.
Matt.
MTU is the "maximum transmission unit" - which amounts to the largest packet size. Standard ethernet uses 1500 bytes. Gigabit devices generally go beyond the standard, and support "jumbo frames". Extending up to 9000 bytes is fairly common, but the ceiling is different for each device. 100 mbit ("fast") ethernet doesn't support jumbo frames at all.
The relationship to speed is indirect. Sending fewer larger packets reduces the processing (and interupt rate) of the clients connected to the network. That reduction in processing load can increase speed. But there are also cases where it actually decreases the speed. It doesn't make the network itself faster - it remains gigabit. In some ways it makes the network perform less well.
Also, if you do set the MTU higher than 1500, you need to ensure that the network equipment can actually deliver packets that size. If it can't, then you end up with either packet loss or fragmentation - both of which will kill performance.
Since it doesn't always help, it makes sense to benchmark performance against normal ethernet before you commit to using jumbo frames.
The net here is that you having a problem, so the first step is to put the system into a standard mode. The RN1100 should give you 18-25 MB/sec over gigabit. That's a considerable boost over the 5-6 that you are seeing.
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