Linux
LVM cache and mismatched logical block sizes Paid Members Public
LVM cache needs the origin and cache disks to share the same logical sector size (512 vs 4096). If they differ, LVM errors out.
SAS Drives Showing 0B in lsblk and Missing from Multipath: The 520-Byte Sector Problem Paid Members Public
Enterprise SAS SSDs repurposed from storage arrays often arrive formatted with 520-byte sectors — a T10 DIF/PI integrity field used by array controllers that Linux cannot handle. The kernel rejects the drive entirely, reporting 0B in lsblk and leaving multipathd with nothing to work with.
Online removal of a LUKS disk encryption Paid Members Public
Believe it or not - sometimes there might be cases when you need to actually remove encryption from a system. This guide will let you know how to remove LUKS from a virtual machine when the root partition is running on this disk.
ceph 20.2.0 (tentacle) released Paid Members Public
Ceph 20 is out - and you should get your hands on it!
OpenVPN DCO part of linux kernel Paid Members Public
openvpn dco will be part of linux kernel 6.16 - that's huge and you should have this on your radar to benefit from huge performance gains!
Cannot access more than a few virtual functions using SRIOV Paid Members Public
SRIOV is a powerful technology with it's own challenges. Sometimes simple things are the solutions. Still you can always learn a little more about how it works behind the curtain!
ingress-nginx 1.12 & allow-snippet-annotations Paid Members Public
If you need to use snippet annotations (why?) on ingress-nginx - you'll also need to adjust the annotation filtering.
multus - deadlock state on thick plugin Paid Members Public
Using Multus CNI's 'thick plugin' in Kubernetes can cause pod startup deadlocks due to circular dependencies between pods and the Multus daemon. Switching to the daemonless 'thin plugin' mode effectively resolves this initialization issue.
