A technically detailed guide to building a backup strategy you can trust — covering the 3-2-1-1-0 rule, full/incremental/differential backups, RTO and RPO targets, Restic with Backblaze B2, rclone for multi-cloud redundancy, production-ready automation scripts, healthcheck monitoring, and the restore testing discipline that turns a backup into a guarantee.
Storage
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Backup Strategy in Practice: Restic, Backblaze B2, rclone, and Actually Testing Restores -
NVMe-over-Fabrics: Block Storage at Near-Local Latency Over the Network NVMe-over-Fabrics extends the NVMe queue model across a network so a host can talk to remote SSDs the same way it talks to local ones. This post is about how the queue-pair model actually maps to RDMA, TCP, and Fibre Channel transports, why TCP made the protocol mainstream, how namespaces and ANA multipath behave in practice, and where NVMe-oF beats and loses to plain iSCSI and direct-attached disk.
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ECC for Flash: Hamming to LDPC Raw NAND ships with thousands of bit errors per page and would be unusable without error correction. This is the story of how ECC evolved from single-bit Hamming through BCH to soft-decision LDPC, what "soft bits" physically are, and the UBER math that turns a noisy die into a reliability promise.
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NAND Interfaces: ONFI, Toggle, and the Speed Problem The wire between the flash die and the controller has quietly become the thing that bounds SSD throughput. A tour of ONFI and Toggle Mode, the climb from asynchronous SDR to 3600 MT/s NV-DDR3, what read/write training actually does, and why signal integrity now dictates how many dies you can hang off a channel.
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NAS Drive Selection: Reusing the Disks You Already Have You bought the NAS but not a stack of NAS-rated drives. Here is how to figure out which disks already in your possession are safe to put in an array, what caveats each drive type carries, how to estimate the remaining life of an older drive from its SMART data, and how all of that constrains the RAID layout and capacity you can actually build.
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Power-Loss Protection When the rail collapses mid-write, an SSD has milliseconds to harden its volatile cache and its mapping tables before the lights go out. A tour of the hold-up energy problem, capacitor banks and 1/2 C V^2 sizing, what "data at rest" weasel-wording actually covers, the dangerous SLC-to-TLC folding window, and how to test PLP claims with a relay rig instead of trusting the datasheet.
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The Flash Translation Layer The FTL is the firmware lie that lets your SSD pretend to be a disk. A tour of L2P mapping, garbage collection and the write-amplification math, why overprovisioning is the master knob, how wear leveling and TRIM fit, and why fresh-out-of-box benchmarks are marketing and steady state is the only truth.
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The NAND Commodity Cycle Why NAND flash is a commodity whose price crashes and spikes with terrifying violence: the multi-year capex lead times, fixed-cost economics, and brutal consolidation down to five players that turn storage into a boom-bust market where the cycle, not the engineering, decides who lives and who dies.
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Zoned Storage and FDP Conventional SSDs spend DRAM, spare capacity, and write endurance fighting a problem the host created: blind data placement. Zoned Namespaces, Flexible Data Placement, and their HDD ancestor SMR all attack that waste by letting the host tell the drive where data goes. Here is how each one works, what it costs in software, and who should actually care.
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3D NAND Architecture: Building Memory Sideways, Then Up Why planar NAND hit a wall at 15nm, how the industry turned the bit line vertical, charge-trap versus floating-gate cells, string stacking, the channel-hole etch that gates everything, CMOS under and bonded to the array, and what the 300-layer class actually means.
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NAND Trim: Calibrating Flash Memory at the Factory Every NAND die leaves the fab analog and imperfect. Trim is the layer of per-die calibration constants — read levels, program voltages, pump regulation, timing — that makes billions of slightly different devices behave like one uniform product. From first principles to what managing trim settings actually involves.
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QLC, PLC, and the Density Endgame Each extra bit per cell doubles the voltage states crammed into the same window: the exponential-pain, linear-gain math of multi-level NAND, where QLC genuinely works versus where it's a trap, SLC caching as the universal apology, and an honest read on whether PLC ever ships.
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The Read Window Budget: Margin Accounting in NAND Design Every NAND reliability mechanism — retention loss, read disturb, cycling wear, temperature shift — is a withdrawal from one shared account: the read window budget. How the budget is defined, measured, allocated, and defended, and why every flash failure story is ultimately a budget overrun.
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What Comes After NAND? Every "NAND killer" so far has died instead: the 3D XPoint post-mortem, honest assessments of MRAM, ReRAM, FeRAM, and PCM, why incumbency in memory is nearly unbeatable, and where the post-NAND future actually lives — bonded silicon, CXL tiers, and NAND replacing NAND.
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Error-Correcting Codes: From Hamming to Reed-Solomon Data does not survive storage and transmission by accident. Error-correcting codes — from the elegant simplicity of Hamming(7,4) to the polynomial algebra of Reed-Solomon — are what stand between your bits and a noisy, unreliable physical world. This post works through the mathematics that keeps your RAID array, NVMe drive, QR code, and deep-space telemetry intact.
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How Data Lives on Platters and Flash: The Physics of Storage Magnetic domains, GMR read heads, perpendicular recording, SMR track geometry, NAND floating gates, charge-trap 3D NAND, wear leveling, and why all of this matters when you pick drives for ZFS — the physics underneath every storage decision.
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Yxk Zero1 4-Bay NAS: OS Options, Use Cases, and Drive Recommendations The Yxk Zero1 is a compact 4-bay NAS built around Intel's N100 — low TDP, QuickSync transcoding, and dual 2.5GbE in a desktop form factor. This guide covers every serious OS option, practical use cases, drive selection, and the real trade-offs you need to know before buying.
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Rook: Ceph as a Kubernetes Operator Rook turns Ceph into a Kubernetes-native workload: it deploys and reconciles monitors, OSDs, and managers as pods, exposes block, filesystem, and object storage through a handful of CRDs, and handles day-2 operations — scaling, upgrades, failure recovery — through the operator loop. This post covers the full architecture, the key CRDs with YAML, StorageClass patterns for RBD and CephFS, external-cluster mode, and an honest verdict on when Rook-Ceph is the right tool versus when Longhorn or cloud-native block storage is the better answer.
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Ceph as Software-Defined Storage: Block, File, and Object Across Every Platform What software-defined storage really means, why Ceph is the reference implementation, and how to actually consume it — RBD block, CephFS file, and RGW object — from Linux, macOS, and Windows, plus deep Proxmox integration and the networking that holds it all together.
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LVM and Linux Filesystem Comparison LVM from physical volumes through logical volumes, thin provisioning, LVM snapshots, online resize, and a practical comparison of ext4, XFS, Btrfs, and ZFS on Linux — with guidance on when to use each and how to configure them.
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TrueNAS SCALE Deep Dive ZFS pool and dataset design, SMB and NFS shares, iSCSI for VM storage, snapshot and replication jobs, ZFS ARC tuning, SMART monitoring, and navigating the app ecosystem on TrueNAS SCALE.
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Proxmox VE: The Comprehensive Guide A complete guide to Proxmox Virtual Environment: installation and post-setup hardening, KVM virtual machines with cloud-init, LXC containers, ZFS and Ceph storage, bridged and VLAN networking, clustering with Corosync, high availability, GPU passthrough, Proxmox Backup Server, and automation via the REST API and Terraform.
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ZFS for the Homelab: Storage That Doesn't Lie A practical guide to ZFS on Linux: pool layout decisions (RAIDZ vs mirrors), dataset properties, snapshot strategies, send/receive replication for offsite backup, scrub scheduling, and ARC tuning for systems where RAM is not unlimited.
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Standalone Ceph Without Proxmox: cephadm, Pool Design, and Day-2 Operations Running Ceph on plain Linux without Proxmox hiding the complexity — bootstrapping with cephadm, designing pools and CRUSH rules for your hardware, exposing RBD, CephFS, and RGW, and the day-2 operations that keep a cluster healthy.
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Btrfs in Production: Snapshots, Send/Receive, Quotas, and the Pitfalls An honest assessment of running Btrfs in production — what it gets right with snapshots, send/receive, and transparent compression, where it's still dangerous with RAID5/6, and how to use its quotas and tooling without getting burned.
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fio Benchmarking Cookbook: Stop Using dd, Start Measuring What Matters Why `dd` tells you almost nothing about storage, and how to measure what matters with fio — building realistic jobs for IOPS, throughput, and latency across queue depths so your numbers reflect real workloads rather than cache.
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MinIO: Self-Hosted S3 — Deployment, Erasure Coding, and Performance Tuning Running MinIO as self-hosted, S3-compatible object storage — deployment topologies, how erasure coding protects data, and performance tuning for line-rate throughput on commodity hardware, with a clear-eyed note on recent licensing changes.
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Parallel Filesystems Compared: Lustre vs BeeGFS vs GPFS vs Weka When NFS stops scaling you need a parallel filesystem — a comparison of Lustre, BeeGFS, GPFS, and Weka covering how each distributes data and metadata, their performance profiles, and the operational burden each one brings.
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XFS Tuning and Internals: Allocation Groups, Log Layout, and Real Workload Tuning What's actually happening underneath the Linux filesystem you've used by default for years — XFS allocation groups, the journal layout, and the tuning that matters for real workloads like large, full, write-heavy volumes.
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Proxmox + Ceph: Hyperconverged Storage Deep Dive A complete guide to building hyperconverged storage with Proxmox VE and Ceph: OSD placement, CRUSH maps, erasure coding, pool configuration, SSD vs HDD tuning, and building a production-grade cluster.
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Nextcloud: Your Own Google Drive (That You Actually Control) A complete guide to deploying Nextcloud: Docker Compose setup, performance tuning with Redis and APCu, external storage backends, Nextcloud Office for collaborative editing, mobile sync, and maintaining a fast, reliable installation.
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NFS and Network Storage: A Complete Guide from Homelab to the Cloud An exhaustive guide to network storage — NFSv3 vs NFSv4, Samba/SMB, iSCSI block storage, Lustre parallel filesystems, and Ceph, plus how all of these map to homelab deployments and cloud equivalents on Azure, AWS, and GCP.
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Object Storage Internals: How S3-Compatible Storage Works and Self-Hosting with MinIO A deep dive into how S3-compatible object storage works under the hood — consistency models, multipart uploads, lifecycle policies, erasure coding, and running production-grade storage with MinIO.
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ZFS for Homelabbers: Datasets, Snapshots, Send/Receive Replication, and Scrub Schedules A practical guide to ZFS for homelab operators — pool creation and tuning, datasets and properties, snapshots and rollbacks, automated replication with zfs send/receive, and the scrub/SMART schedules that keep your data safe long-term.
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Kubernetes for the Homelab: K3s Setup, Workloads, and Beyond A thorough guide to running Kubernetes in your homelab using K3s — covering installation, core concepts, workload deployment, ingress with TLS, persistent storage, migrating from Docker Compose, Helm, GitOps, and cluster operations.
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NFS Filers in Azure: A Complete Management Guide Everything you need to know about managing NFS storage in Azure — Azure NetApp Files and Azure Files NFS — covering provisioning, quotas, user usage, export policies, snapshots, monitoring, and production best practices.
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Proxmox VE: The Ultimate Homelab Hypervisor A comprehensive guide to Proxmox Virtual Environment — covering installation, ZFS and LVM-thin storage pools, VM creation with VirtIO and cloud-init, LXC containers, networking with VLANs, clustering, backups with PBS, GPU passthrough, and the tools and tricks that make it the homelab hypervisor of choice.