ZFS

• ZFS copies=2/3: Extra Redundancy Without a New VDEV—Smart or Waste?
• ZFS Snapshots: The Retention Policy That Prevents ‘Snapshot Hell’ Forever
• ZFS zpool clear: When Clearing Errors Is Correct (and When It’s Stupid)
• ZFS on Root: Installing So Rollbacks Actually Work
• ZFS compression lz4: When It’s ‘Free’ and When It Isn’t
• ZFS NFS: The Tunables That Make It Feel Like Local Disk
• ZFS SLOG power-loss protection: The Feature Your SSD Must Have
• ZFS SMB: Fixing “Windows Copy Is Slow” for Real
• ZFS ECC vs non-ECC: Risk Math for Real Deployments
• ZFS Special VDEV Failure: How to Survive the Nightmare Scenario
• ZFS zfs diff: Finding Exactly What Changed Between Snapshots
• Proxmox on ZFS: the backup strategy that doesn’t lie (snapshots vs real backups)
• Proxmox ZFS checksum errors: disk or cable — how to prove which one
• ZFS Scrub: How Often to Run It and What It Proves
• ZFS Dedup Tables (DDT): What They Are and Why They Hurt
• ZFS L2ARC sizing: When 200GB Helps More Than 2TB
• ZFS Quotas for Multi-Tenant: Preventing One User From Killing the Pool
• ZFS dRAID Sparing: How Distributed Spares Change Recovery
• ZFS Special VDEVs on SAS SSDs: The Pro Move for Metadata
• ZFS IO Scheduler Choices: mq-deadline vs none for HDD, SSD, and NVMe
• ZFS zfs list -o space: The View That Explains ‘Where Did It Go?’
• ZFS Feature Flag Portability: Avoiding “Cannot Import” Surprises
• ZFS atime: The Tiny Toggle That Can Fix ‘Slow Writes’
• ZFS Feature Flags: Compatibility Rules Between Hosts and Versions
• ZFS logicalused vs used: The Numbers That End Arguments
• ZFS Cache Hit Rates: When They Matter and When They Don’t
• ZFS canmount: The Setting That Prevents Boot-Time Surprises
• ZFS Special VDEV Sizing: How Big It Should Be (So You Don’t Regret It)
• ZFS SMART Monitoring: Correlating Drive Warnings with ZFS Errors
• ZFS RAIDZ expansion: What’s Possible Today and Best Workarounds
• ZFS Encryption + Compression: The Order That Makes Performance
• ZFS dedup: The Checkbox That Eats RAM and Ruins Weekends
• ZFS offline/online: Using Maintenance Mode Without Breaking Redundancy
• ZFS on Proxmox vs VMFS on ESXi: Snapshots, Performance, Recovery, and Real-World Gotchas
• ZFS vdev removal: What You Can Remove (and the Limits You Must Respect)
• ZFS acltype: POSIX vs NFSv4 ACLs Without Confusion
• ZFS Checksum Errors: What They Mean and What To Do First
• ZFS Scrub vs SMART Long Test: Which One Finds What
• ZFS fundamentals: What You Actually Get in Practice (and When ext4/XFS Wins)
• ZFS zpool upgrade: When to Upgrade and When to Wait
• ZFS vs Storage Spaces: Why “Easy” Can Become “Opaque”
• ZFS Upgrading OpenZFS: The Checklist That Prevents Breakage
• ZFS Compression with zstd: Picking Levels Without Burning CPU
• ZFS Raw Send: Replicating Encrypted Data Without Sharing Keys
• ZFS NFS Sync Semantics: Why Clients Change Your Write Safety
• ZFS Kubernetes: PV Design That Won’t Bite During Node Failures
• ZFS fio for VMs: Profiles That Match Reality (Not Marketing)
• ZFS xattr: The Compatibility Choice That Changes Performance
• ZFS refquota: The Only Quota That Stops “Used Space Lies”
• ZFS ARC: How ZFS Uses RAM (and Why ‘Free RAM’ Is a Myth)