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Forum Discussion
XS724EM: Questions about fans/cooling
I recently purchased an XS724EM to support the increasing number of multi-gig and 10G devices we have in our home. It's replacing a D-Link 1050-28X with 4x 10G SFP+ ports and the rest gigabit, so tha...
None of the (un)related threads proof that there is any kind of "stacked" fan activity, all fans follow the same thermal management controls, and are expected to run at about the same RPM. Anything else would cause very funny noises.
Checked my rack mounted office switch here operating in a mixed 100M/1000M/2.5/510G mixed operations. All three (plus the power supply fan) are active.And everywhere 10G is in the play, admins need to understand that 10G is not a cool running 1G only platform. Yes, missing 2/3rd of the airflow must make the device run much hotter than expected.
Still convinced your XS724EM requires a hardware replacement. The cumbersome part here is that Amazon does still not properly process returned "new" Netgear equipment for reselling. Last, Amazon does also noti inform the warehouse deal customers about the possible different seller waranty and vendor warranty terms.
Checked my rack mounted office switch here operating in a mixed 100M/1000M/2.5/510G mixed operations. All three (plus the power supply fan) are active.And everywhere 10G is in the play, admins need to understand that 10G is not a cool running 1G only platform. Yes, missing 2/3rd of the airflow must make the device run much hotter than expected.
Still convinced your XS724EM requires a hardware replacement. The cumbersome part here is that Amazon does still not properly process returned "new" Netgear equipment for reselling. Last, Amazon does also noti inform the warehouse deal customers about the possible different seller waranty and vendor warranty terms.
I spoke with Netgear tech support this morning, and the rep assured me (as noted in the other threads) that the fans on the XS724EM will selectively stop spinning unless a certain ambient—not internal—thermal threshold is reached. He explicitly stated that all three fans should be operational when the room hits 50°C/122°F.
I must've asked the following question three times: You're 100% sure that it is expected and intended behavior for some fans to stop spinning altogether during normal switch operation at standard room temperature? And the answer was always, "Yes, definitely."
So, schumaku, I hear exactly what you're saying, and it confirms everything that I would think, too. But Netgear tech support is adamant that the behavior I'm seeing is okay and, Amazon Warehouse purchase aside, they didn't see fit to RMA the unit because this is apparently totally fine.
I really don't know what to make of any of this. All I can say for sure is that the switch can and should run much cooler than it does with the current fan profile—whether that's intentional or broken.
- Room temperature 50°C, not sure what I should answer here.
The office XM724EM here has all three fans operating realiably, room temperature is in the 21..23°C range (leaving alone on how the swith should measure this?), on a light to average load with a few 10G links, and about a dozen GbE (and one Fast Ethernet - Flightradar24 receiver) active concurrently.
Typical switches in this class have one or two temperature sensors, one in the core IC, and one enclosure sensor.
When touching the switch, it feels hot, certainly in the mid to high 50°C range. This is, compared to a modern GbE-only switch, much hotter than inexperienced users might expect - but much below than what we've seen on first and second generation 10G switches.
Had participated in the product Beta, an have never spotted that some of the fans were off, or heard them spin-up later after boot. All testing was done on a similar config, never really operated under less load. And since the fans were never louder, there was nothing to complain. Cumbersome, we have neither a temperature indication nor fan speed indications.
Concluding, I would wonder if there would be different curves used for each individual fan. Just the ubiquitous short "Roar" on the power-up before temperature monitoring and regulation becomes active. Said that, I doubt the support info is correct (alone the room temperature lol) is appropriate. But I'm always willing to learn.
Can YeZ please challenge the switch engineering for more insight please?
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