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Occasionally, it is necessary to debug commands that are slow. Or you may simply be interested in learning how the tools work. While there are many strategies, here are some simple methods that show code flow and timing information. To...

How To Install and Boot Microsoft Hyper-V 2019 from Persistent Memory (or not)

In a previous post I described how to install and boot Fedora Linux using only Persistent Memory, no SSDs are required. For this follow on post, I attempted to install Microsoft Windows Server 2022 onto the persistent memory. TL;DR – I was...

How To Install and Boot Microsoft Windows Server 2022 from Persistent Memory (or not)

In a previous post I described how to install and boot Fedora Linux using only Persistent Memory, no SSDs are required. For this follow on post, I attempted to install Microsoft Windows Server 2022 onto the persistent memory. TL;DR – I was...

How To Install and Boot Microsoft Windows Server 2019 from Persistent Memory

In a previous post I described how to install and boot Fedora Linux using only Persistent Memory, no SSDs are required. For this follow on post, I attempted to install Microsoft Windows Server 2019 and 2022 onto the persistent memory. TL;DR –...

How To Install and Boot VMWare VSphere/ESXi from Persistent Memory (or not)

In a previous post I described how to install and boot Linux using only Persistent Memory, no SSDs are required. For this follow on post, I attempted to install VMWare VSphere/ESXi v7.0u2 onto the persistent memory. TL;DR – It doesn’t...

How to Boot Linux from Intel® Optane™ Persistent Memory

Introduction In this article, I will demonstrate how to configure a system with Intel Optane Persistent Memory (PMem) and use part of the PMem as a boot device. This little known feature can reduce boot times for those that need...

How to build an upstream Fedora Kernel from source

I typically keep my Fedora system current, updating it once every week or two. More recently, I wanted to test the Idle Page Tracking feature, but this wasn’t enabled in the default kernel provided by Fedora. To enable the feature,...

Linux Device Mapper WriteCache (dm-writecache) performance improvements in Linux Kernel 5.8

The Linux ‘dm-writecache’ target allows for writeback caching of newly written data to an SSD or NVMe using persistent memory will achieve much better performance in Linux Kernel 5.8. Red Hat developer Mikulas Patocka has been working to enhance the...

May 30, 2020

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How To Troubleshooting

How To Enable Debug Logging in ipmctl

The ipmctl utility is used for configuring and managing Intel Optane Persistent Memory modules (DCPMM/PMem). It supports the functionality to: Discover Persistent Memory on the serverProvision the persistent memory configurationView and update the firmware on the persistent memory modulesConfigure data-at-rest...

Intel Optane Persistent Memory Modules report “Non-functional” state in ipmctl

Issue Executing ipmctl show-dimm to get device information shows the persistent memory modules in a ‘Non-functional’ health state, eg: Other ipmctl commands may fail and return “No functional DIMMs in the system.”, eg: Applies To This issue applies to systems...

May 29, 2020

Using ltrace to see what ipmctl and ndctl are doing

How To Install and Boot Microsoft Hyper-V 2019 from Persistent Memory (or not)

How To Install and Boot Microsoft Windows Server 2022 from Persistent Memory (or not)

How To Install and Boot Microsoft Windows Server 2019 from Persistent Memory

How To Install and Boot VMWare VSphere/ESXi from Persistent Memory (or not)

How to Boot Linux from Intel® Optane™ Persistent Memory

How to build an upstream Fedora Kernel from source

Linux Device Mapper WriteCache (dm-writecache) performance improvements in Linux Kernel 5.8

How To Enable Debug Logging in ipmctl

Intel Optane Persistent Memory Modules report “Non-functional” state in ipmctl

Using ltrace to see what ipmctl and ndctl are doing

How To Install and Boot Microsoft Hyper-V 2019 from Persistent Memory (or not)

How To Install and Boot Microsoft Windows Server 2022 from Persistent Memory (or not)