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Is DWPD Still a Useful SSD Spec?

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DWPD (Drive Writes Per Day) is an SSD endurance metric that estimates how many times a drive’s full capacity can be written each day over its warranty period. This article explains how DWPD is calculated, why vendor ratings can be misleading, how NAND flash wear actually works, and which factors — including bit density, overprovisioning, and usable capacity — better predict real-world SSD lifespan and performance.

OpenZFS – Understanding ZFS vdev Types

ZFS pools are built from virtual devices (vdevs), and the topology you choose directly affects performance, redundancy, rebuild times, and scalability. This guide explains ZFS vdev types including mirror, RAIDz1/2/3, dRAID, LOG, CACHE (L2ARC), SPECIAL, and SPARE vdevs, along with the tradeoffs of each configuration for different workloads and hardware environments.

FreeBSD vs. Linux – Which Operating System to Use for OpenZFS

Age-old discussion: ZFS running on Linux or FreeBSD? We’re not going to set out to tell you which operating system you should use. Both choices are excellent — but we’ll lay out how different (or alike) it is to run OpenZFS on either to help anyone on the fence decide which OS to use beneath our favorite filesystem.