Yearly Archives: 2020

22 posts

AMD EPYC and Ryzen ThreadRipper Cooling: It’s Important to get the Right Cooler!

We’re in the process of building an AMD ThreadRipper based system. One thing to keep in mind when it comes to either AMD EPYC or AMD ThreadRipper is that they are _big_ processors! So, when looking to cool the processor it’s important to make sure the cooler is designed for […]

Azure Stack HCI/Storage Spaces Direct: Optimal Network Configuration

There are many ways one can go about setting up the networking for an Azure Stack HCI (ASHCI)/Storage Spaces Direct (S2D) hyper-converged infrastructure (HCI) cluster. TL;DR Our rule of thumb is to start with four 25GbE ports via two network adapters for multiple nodes requiring switches or even in smaller […]

Lessons Learned: Rack Enclosures: PDUs, PDU Cables, and Cable Ties

This is what one of our Proof-of-Concept (PoC) rack enclosures looked like before we were finished buttoning things up: Four Node Storage Spaces Direct Cluster with Mellanox 40GbE RoCE Fabric In the end, we did a decent job of wrapping and coiling the massive 40GbE cables and the 250V PDU […]

Windows 10: WiFi Download Speeds Stall

There is an issue with Receive Segment Coalescing (RSC) on Windows 10 that causes download speeds to stall while connected via WiFi. Steps to disable Rsc using Microsoft’s automated tool: 1) Download the “.diagcab” file located here: https://aka.ms/diag_cssemerg11005 2) Run it, and let it see if it can determine the […]

Custom Build S2D: The Elusive SlimSAS 8x (SFF-8654) Cable

Server and workstation boards have had SlimSAS 8x connectors for dual NVMe drive setups for quite a long time now. ASRock Rack EPC621D6U-2T16R (BTO Board) The SlimSAS SFF-8654 connector is to the right of the PCIe x16 slot. When they started appearing on server and workstation boards, we began trying […]

Backup Restore Errors: Network (UnAuthenticated) and Lost Domain Trust Fix

We had to restore a VM that became unresponsive a couple of days ago. The backup was from 1900Hrs the night before so only about 14 hours to the moment we realized we needed to restore. Once the restore was complete, the VM did not come back online. We were […]

TYAN RMM TIPs: Default Username and Password Plus Set Up Tips

TYAN has an excellent built-in Remote Management Module (RMM) that does not require an extra license like some Tier 1 vendors do. TYAN Default Administrator Username and Password The default TYAN username and password is: Username: root Password: superuser The first thing we do when we sign in is create […]

Replication Errors: 1127: Hard Disk Operation Failed, 8524 (0x214c): DSA Operation … DNS Lookup Failure – FIX

We ended up with a situation where a workstation lost trust with the domain. When looking into what was happening on the two Domain Controllers (DCs) on the domain it took a while to figure out just where the problem was. The first error was 1127, failing to write to […]