Number one cause of random hard crashes/hangs is RAM. Re-seat it, replace it, down-clock it, run a single stick, do everything you can to either rule it out as a problem, or to isolate the problem to a particular module or channel.
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merkuron@alien.topBto Homelab•Trying to decipher IO options of supermicro motherboardEnglish1·2 years agoMaybe it’s clear this way:
For every 2 lanes you want allocated to the PCIe slot (up to 4), you lose two SATA lanes. Since there are 8 lanes total, but 12 possible lane destinations, they pre-made combinations of destinations that they think would be useful:
- All 8 lanes to SATA, 4 onboard and 4 through MiniSAS
- 2 lanes to PCIe and 6 to SATA, 2 onboard and 4 through MiniSAS
- 4 lanes to PCIe and 4 to SATA, either activating the 4 onboard ports or the MiniSAS (but not both)
merkuron@alien.topBto Homelab•Looking for managed switch with POE, 10GbE and more than 10 ports (ideally 24)English11·2 years agoCommscope/Ruckus/Brocade ICX7650-48ZP will do it. Be prepared for sticker shock.
Make the 10.0.0._ addresses loopback addresses, and do point-to-point connections from each box to every other box. No idea how to do this in ESXi, but it’s straightforward in *nix/BSD.
merkuron@alien.topBto Homelab•Dell R730XD: CPU temps are different, seems to be a socket issueEnglish1·2 years agoCPU1 handles almost everything about being a normal computer: booting, chipset, most of the I/O, etc. CPU2 is along for the ride and handles its own I/O lanes (PCIe) and whatever work the kernel wants to send to it. The load is not symmetrical, so if you have turbo enabled, CPU1 will be consistently boosting more than CPU2 as it is handling all of its tasks —> warmer CPU1. This is why “tandem” dual-CPU setups have CPU1 upstream in airflow from CPU2.
merkuron@alien.topBto Homelab•Best Intel® Xeon® Processor E5 v2 Family CPU to getEnglish1·2 years ago2667v2 and the 2697/2696v2 are really tops for this generation.
You could desolder it and solder a new one on, or possibly even solder one on top of the existing LED. Same as replacing any other on-board component.
IPMI generally only shares network access with on-board gigabit LAN, in addition to having its own dedicated IPMI LAN port. When you’re using high speed networking, generally you connect both the high speed (for normal use) and the dedicated IPMI LAN port (for IPMI).
merkuron@alien.topBto Home Networking•Noob: Home networking for Data LAN to my rooms-figuring out to understand how this works.English1·2 years agoYou’re assuming wrongly, they use RJ-45 wall jacks even for telephone. The numbering suggests that D-1 is the only port wired for data, the T ports are wires for telephone. The punch down block at the top shows only 1 pair connected per destination —> telephone. To convert one of these to Ethernet, you’d need to pull it out of the punch down block and instead punch all 4 pairs into a CAT6 jack.
In that case, just copy someone else’s homework. Look up what Supermicro is using for wattage in 1U non-GPU servers, and use those numbers.
merkuron@alien.topBto Homelab•Minimum CPU spec to max out 40GbE and 10GbE dual 10GbE simultaneously?English11·2 years agoYou’ll definitely need something with fast PCIe lanes for NVMe. Something with either PCIe 4.0 x4 coupled with a very fast SSD, or something with a lot of PCIe 3.0 lanes.
Is your RAM on the QVL? Ryzen’s notorious pickiness about RAM carries over to TR and EPYC, too. One of the first things before POST and BIOS splash display is memory training. If it can’t get past that, something about memory needs adjustment. Have you tried downclocking it?
How close do you want to get? Budgeting about 200W per socket for “normal”-ish CPUs and 400-450W per socket for latest EPYC should get you in the right range.
merkuron@alien.topBto Homelab•Help! How do I troubleshoot NAS becoming unavailable, requiring hard reboot? ZFS pools in Debian 12 shared via SMB/NFS, LGA1366 Intel X5670 18 GB RAM.English1·2 years agoI’ve had drive failures bring down entire systems. Replace
sda
and see if the problems continue.
merkuron@alien.topBto Homelab•HP Z440 workstation, E5-1650V3 (Haswell) power consumptionEnglish1·2 years agoE3-1230v2 is completely different to an E5v2 or an E5v3. The E3’s were all 4-core dies. E5’s were built from two different dies, both of which had well more than 4 cores. The chipset is different between E3 and E5, the memory controller is different, and the PCIe lane count is different. You can’t directly compare an E3 to an E5.
Idle power can be estimated (CPU+RAM+chipset+drives+GPU), but is also majorly affected by:
- Efficiency of the PSU: big OEMs were pretty good about putting efficient PSUs in their workstation products, but below 10% of rated load capacity, efficiency will be crap. Exactly how crap, depends on the specific PSU.
- BIOS settings: there are a dozen different BIOS settings that can dramatically change how the CPU behaves, and the defaults vary for each system. Sometimes the defaults do not allow the processor to throttle all the way back under low load.
Your measured power consumption of 100W at low/no load is about what I’d expect. Can you reach lower? Maybe with the right combination of settings, and switching to slower/lower voltage memory, and making sure that the GPU is also throttling down, you could reach 65-80W idle. But I wouldn’t expect less than that.
Tried a different cable, just in case you’re capping out at 100Mbps?
Which protocol are you using to test file transfer? If it’s anything involving encryption, that CPU will be hurt real bad, with no AES-NE.
Xeon E3’s are unbuffered DIMMs only.
merkuron@alien.topBto Homelab•Does Gigabyte motherboards make server motherboard for Intel Xeon E-2336?English1·2 years agoBased on chip family, this is the only one: https://www.gigabyte.com/Enterprise/Server-Motherboard/MX33-BS0-rev-1x
To use DOS-based flash tools, you must boot in BIOS mode with CSM (and OPROMs too, I think) enabled. If you’re booting without a CSM, use an EFI shell with the EFI flash executables.