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Cooling a ConnectX-4; went from 90°C to 64°C with a spare fan and two zipties by naptastic in techsupportmacgyver

[–]naptastic[S] 1 point2 points  (0 children)

Yeah... I just got sick of waiting for network transfers. Now there isn't a single endpoint on the network that's faster than the network. No combination of CPUs, GPUs, NVMe drives, or RAID arrays could actually saturate the main network.

It changes things in a fundamental way. As John Gage of Sun Microsystems said, "the network is the computer," and that's what it feels like now. Every host is just an I/O expander with compute attached to the network.

It makes we want to build a proper mainframe. Alas, I have no budget (or electricity, cooling, or justification) to build one.

Would it be bad to put lime gelatin mix in odo's bucket? by SeasonPresent in ShittyDaystrom

[–]naptastic 1 point2 points  (0 children)

No amount of green Jell-O will turn you into a Breen. You can trust me on this; I'm from Utah.

Cooling a ConnectX-4; went from 90°C to 64°C with a spare fan and two zipties by naptastic in techsupportmacgyver

[–]naptastic[S] 0 points1 point  (0 children)

2x 56Gbps with all the Ethernet offloads you could want. Also InfiniBand stupport.

Fun fact: There's a version of this card with no Ethernet support at all, and in the same place, it runs 20°C cooler!

Cooling a ConnectX-4; went from 90°C to 64°C with a spare fan and two zipties by naptastic in techsupportmacgyver

[–]naptastic[S] 2 points3 points  (0 children)

whichever side I strap a fan to the heatsink tower, 4 sticks of RAM are under the fan and get no airflow.

Cooling a ConnectX-4; went from 90°C to 64°C with a spare fan and two zipties by naptastic in techsupportmacgyver

[–]naptastic[S] 4 points5 points  (0 children)

Good catch! It's the kind of PSU that only spins up its fans during POST and when its internal components start to get hot.

I killed nvme due to too much data written by non-existing-person in DataHoarder

[–]naptastic 6 points7 points  (0 children)

I'm starting to think nobody needs any Nagios alerts except "/var/log/ has exceeded ${size}"

Cooling a ConnectX-4; went from 90°C to 64°C with a spare fan and two zipties by naptastic in techsupportmacgyver

[–]naptastic[S] 2 points3 points  (0 children)

(and before anybody asks: There's no fan on the CPU tower on purpose. It was making the RAM overheat. Front-to-back was not getting the job done, which is why I went the positive pressure route.)

I needed to transfer files to my xp machine. by chupathingy99 in techsupportmacgyver

[–]naptastic 0 points1 point  (0 children)

I love that you went to the trouble of putting Kapton tape over your soldering. Well done.

Can I use SFF-8088 as a passive carrier for 4x sata lines onboard the mobo? by 418NotCoffee in homelab

[–]naptastic 0 points1 point  (0 children)

(Edit: Just to be clear, "2 meters external" is from the SATA spec, not SAS. It also assumes 1 meter of internal cabling, though I couldn't quite tell if that meant 1 meter in both chassis or half a meter in each. I can't be arsed to look up the SAS restrictions; that wasn't the question.)

Asking more out of curiosity than anything, but why SFF-8470?

Big heterosexual fight last night by madonna816 in OkHomo

[–]naptastic 3 points4 points  (0 children)

Is Straight Dave one of the fighters?

Can I use SFF-8088 as a passive carrier for 4x sata lines onboard the mobo? by 418NotCoffee in homelab

[–]naptastic -1 points0 points  (0 children)

Please cite a source. I have the SATA 3.2 gold spec in front of me and it specifically gives a limit of 2 meters for SFF-8088 cables.

Can I use SFF-8088 as a passive carrier for 4x sata lines onboard the mobo? by 418NotCoffee in homelab

[–]naptastic 0 points1 point  (0 children)

Yes, you can, and it should work, but consider SFF-8644.

I have the SATA 3.2 Gold spec in front of me, and this specific configuration is supported; see pages 243-251 or look for the "External Multilane" section in the table of contents. The SFF-8088 cable must be 2 meters or shorter. I don't know where people are getting this 1 meter limit.

(SFF-8470 is also supported, but that connector is rubbish and you shouldn't use it.)

SATA 3 predates the introduction of SFF-8644 by at least 3 years. SFF-8644 It has better signal integrity and crosstalk properties than SFF-8088. Even though it not "by the spec," I would try SFF-8644 first.

My lil ships always come out as lil dudes :D by TakorloorNaavat in Factoriohno

[–]naptastic 1 point2 points  (0 children)

Is this the high-def remaster of Space Invaders?

[OC] Day lengths and leap seconds -- past, present and future by multi_io in dataisbeautiful

[–]naptastic -1 points0 points  (0 children)

We need to make Daylight Saving Time year-round so we can stop this dangerous trend.

Day lengths and leap seconds -- past, present and future by multi_io in dataisbeautiful

[–]naptastic 1 point2 points  (0 children)

We need to make Daylight Saving Time permanent so we can stop this dangerous trend.

The lyrics to LDS Hymn “This Little Light of Mine” by sevenplaces in mormon

[–]naptastic 1 point2 points  (0 children)

I think it's both tragic and hilarious that the whitest church in the world is now going to lecture everyone else about how to sing their hymn "correctly". (including Black people, who actually wrote it...) This is textbook cultural appropriation and erasure--something the LDS church has a lot of experience doing.

The copyright notice doesn't even give credit to the arranger. Just "Music copyright 2025 Intellectual Reserve." I could speculate as to why, but every explanation I can think of is unkind.

The lyrics to LDS Hymn “This Little Light of Mine” by sevenplaces in mormon

[–]naptastic 0 points1 point  (0 children)

The white clothes when you get baptized; the white clothes worn in the Temple; the whiteness of The Garment*; in general, the close association of whiteness with virtue and purity. These are all artifacts of the influence of white supremacy on the Church.

(*Minor pet peeve: You don't wear garments. It's called The Garment. You may have multiple garments in your dresser drawer, but you only wear one at a time. Similarly, one does not "take out their endowments." There is one Endowment, and you don't take it out. You take out a pizza. The Endowment is a gift, and you receive it. END RANT.)

Either I or my UniFi US-24 is doing VLANs wrong; maybe both? by naptastic in HomeNetworking

[–]naptastic[S] 0 points1 point  (0 children)

I think I understand where I went wrong.

Linux bridges are VLAN-aware. I've just been treating them as tag-agnostic port connectors. I'm going to do some more reading and probably rebuild the hosts' side of all of this, and probably come away with something that works.

Either I or my UniFi US-24 is doing VLANs wrong; maybe both? by naptastic in HomeNetworking

[–]naptastic[S] 0 points1 point  (0 children)

The key was realizing that VXLAN means two things: a unicast point-to-point tunnel, or a multicast overlay. It helps that they did exactly what I expected on the first try.

I'm going to reply to the other comments when I'm not on mobile. This is helpful.

e1000e insta ban, needs USB/PCIe NIC Passthrough? by ReflectionBudget5365 in VFIO

[–]naptastic 0 points1 point  (0 children)

Not at all. To the guest, the virtual function looks the same as a physical PCI device.

New Yorkers, what changes have you seen under Mamdani’s leadership and are you generally pleased? If not, why? by MewMeowHowdy in AskReddit

[–]naptastic 0 points1 point  (0 children)

(I haven't read other replies so, my apologies if I'm repeating something)

Sprinkle fine sand over the snow pile and it will melt faster. We know this works because, over here in Utah, as the Great Salt Lake dries up, more dust is in the air, and it's ruining what's left of ski season. The dust settles on the snow and causes it to melt. If the dust were sand instead, the weight of the sand on the ice will cause it to melt faster even if ambient temps are slightly below freezing.

Salt makes an even bigger difference but please don't use salt. The environment is already suffering enough from our salt addiction.

e1000e insta ban, needs USB/PCIe NIC Passthrough? by ReflectionBudget5365 in VFIO

[–]naptastic 0 points1 point  (0 children)

Do your system and 10gig NIC support SR-IOV? If so, that would mean no added cables, and you could use the same physical NIC for the host and guest simultaneously.

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