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we currently use a Netgear ReadyNAS RR4312X (for 2 years now) connected to a 10 Gb Netgear switch. Everything worked fine until a couple of weeks ago when we observed some overall system lag (about 2-3s sometimes) as well as a speed cap for reads only to 100Mb. We have 2 volumes in operation, one 5 Disk Raid 5 with Seagate 12TB exos disks (tiered with 2 SSDs) and another 5 Disk Raid 5 with Samsung 512 GB SSDs. Here's a screenshot of the write speed vs the read speeds:
and one with the disk setup plus some disk data
Before this strange speed cap on reads we had the same speed for reads and write (10gbps cap) on anyone of the 2 volumes and 0 lag in the system. All the disks appear to be in very good condition and are relatively new.
... a connection by an 10gb IP port should go the same way normally, respectively the 10 gb switch, no?
No. When there are multiple routes from the NAS to the PC, the NAS chooses the adapter it wants to use when sending to that PC. That can be a different adapter than the one that the inbound traffic from the PC to the NAS is being received from.
There is a metric associated with each route that determines the choice. There are ways to set these metrics in linux, so you could go in with ssh and try to adjust them. But if you don't really need the gigabit bond, then it's simpler just to remove it.
If you are ok with enabling ssh, I suggest installing iperf, and using that the measure the network throughput. That will help sort out if the issue is network related or not. Also, you could look at the network stats on the switch.
It’s just on the nas. The rest of the pc’s work just fine with the 10gb switch.
Sorry, I think you misunderstood the question.
Is the NAS->PC link limited to 100 megabit on all the PCs? Or only one?
Also, how is the NAS connected to the switch? Do you have more than one ethernet cable connected? If so, are you connecting just 10 gigabit ports, or do you also have some gigabit ports connected?
Reads from the nas are limited to 100 mb on all other PCs. The nas is connected to the 10 gb switch with both it's ports as well as to a 1 gb switch with it's other 4 normal port in LACP port. I tried changing the cables and there was no change.
... a connection by an 10gb IP port should go the same way normally, respectively the 10 gb switch, no?
No. When there are multiple routes from the NAS to the PC, the NAS chooses the adapter it wants to use when sending to that PC. That can be a different adapter than the one that the inbound traffic from the PC to the NAS is being received from.
There is a metric associated with each route that determines the choice. There are ways to set these metrics in linux, so you could go in with ssh and try to adjust them. But if you don't really need the gigabit bond, then it's simpler just to remove it.
