ZFS: Setting up ZFS storage on Ubuntu

If you are new to ZFS, I would advise doing a little bit of research first to understand the fundamentals. Jim Salter’s articles on storage and ZFS are very recommended. https://arstechnica.com/information-technology/2020/05/zfs-101-understanding-zfs-storage-and-performance/ The examples below are to create a pool from a single disk, with separate datasets used for network backups.…

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Linux / Ubuntu / hdparm: Identifying drive features and setting sleep patterns

Preparing the storage Install hdparm and smartmontools Install hdparm and the SMART monitoring tools. Identify the right hard drive Make sure you identify the correct drive, as some of the commands will destroy data. If you don’t understand the commands, then check them first. You have been warned. Identify the…

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SNFS/Xsan: Quantum SNFS metadata controller and Xsan client compatibility chart

In a previous life, I designed and built many SANs based on Xsan (I believe I started with Xsan 1.3). I then migrated to looking after SANs based on SNFS, either from 3rd party vendors, or Quantum. I believe that the age of Fibre Channel is long over (although SNFS…

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Raspberry Pi: Installing, hardening and optimising Ubuntu 20.04 Server

I have been trying to document the process of configuring a Raspberry Pi as a Time Machine Capsule, but the article became far too long. It covered far too much information and was really hard to read. I then decided to break the stages into more manageable steps. This has…

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Ubuntu: Installing/fixing TP-Link AC1200 (T4UH 1.0) drivers in Ubuntu 20.04 LTS

I wrote an entry about this adapter and Ubuntu 18.04. This week my 20.04 LTS installation started to freeze randomly. I suspected several things, but through a process of elimination it ended up pointing to the Wi-Fi adapter. I can’t rule out a hardware issue yet, but the new driver…

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