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#0
Learn RAID - Pre-Requisite Skills & Setup Environment
Before touching mdadm, you need to master basic Linux administration such as disk management, partitioning, and mounting. In this episode you will also set up a lab with additional disks, install mdadm and OpenZFS, and verify the environment.
August 10, 2026
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#1
Learn RAID - History, Background & Why You Need RAID
This episode unpacks the origins of RAID from the 1987 Berkeley paper, the evolution of RAID levels from 0 to dRAID, and the real problems it solves: significant disk failure rates, performance needs, and combined capacity — each with its own tradeoffs.
August 10, 2026
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#2
Learn RAID - Core Concepts & RAID Levels
This episode unpacks the three basic RAID mechanisms — striping, mirroring, and parity — as well as RAID levels 0, 1, 4, 5, 6, 10, and nested levels, including how to calculate capacity and overhead and the URE tradeoff for large disks.
August 10, 2026
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#3
Learn RAID - Software vs Hardware vs Firmware RAID
This episode compares three RAID implementation paths: software RAID based on the kernel MD driver and mdadm, hardware RAID with controller cards and battery-backed cache, and firmware or fake RAID IMSM and DDF along with their limitations.
August 10, 2026
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#4
Learn RAID - mdadm: Create & Assemble Array
This episode teaches you how to create your first array with mdadm using --create, understand metadata versions from 0.90 to 1.2, write the mdadm.conf configuration, and ensure the array assembles automatically at boot.
August 10, 2026
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#5
Learn RAID - mdadm: Detail, Status & Monitoring
This episode teaches you how to read an array's condition via /proc/mdstat and mdadm --detail, interpret states such as clean, active, degraded, and rebuilding, and set up mdadm --monitor and systemd mdmonitor for failure notifications.
August 10, 2026
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#6
Learn RAID - Spare, Replace & Hot-swap
This episode covers disk failure handling: adding a hot spare with --add-spare, re-adding a disk that was temporarily disconnected, the physical hot-swap disk replacement process, and verifying the rebuild completes via /proc/mdstat and mdadm --detail.
August 10, 2026
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#7
Learn RAID - Resize & Reshape
This episode teaches array capacity expansion with mdadm --grow, adding devices to RAID 1/5/6/10, filesystem resize with resize2fs and xfs_growfs, plus reshape between levels and changing the chunk size along with its risks.
August 10, 2026
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#8
Learn RAID - ZFS RAIDZ (dRAID, AnyRaid)
This episode covers ZFS-based RAID: the differences between RAIDZ1/2/3, why ZFS doesn't use mdadm with RAID 5, RAIDZ expansion which is stable in OpenZFS 2.4, and dRAID and AnyRaid for large-capacity storage.
August 10, 2026
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#9
Learn RAID - RAID 10 & Performance Workloads
This episode covers RAID 10 as a combination of mirroring and striping for high-performance workloads, how to calculate IOPS and throughput, fast rebuilds, and when to choose RAID 10 over RAIDZ or RAID 6 for databases and VMs.
August 10, 2026
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