OpenZFS

Topic	Replies	Views	Activity
OpenZFS Topology FAQ: What's a zpool? What's a vdev? OpenZFS faq #Hi, ZFSers! If you’re new to ZFS, you’re probably not entirely solid on how the structure of the system works. This post is here to help, complete with lovely ASCII diagrams (that don’t require loading other links, sin…	3	3474	August 29, 2025
About the OpenZFS category OpenZFS	0	490	June 29, 2023
Using recordsize=1M as a default for non-specialized data storage (that don't have specific recordsize recommendations)? OpenZFS	4	151	November 9, 2026
Can sanoid/syncoid handle hierarchy of datasets with different sets of snapshots? Sanoid	6	77	November 3, 2026
Webmin module for Sanoid? OpenZFS	10	206	November 2, 2026
Encrypting pool-level metadata: LUKS-encrypted special vdev? OpenZFS	1	43	November 2, 2026
Truly Awful, Horrendous, Very Bad Write Performance on Time Machine Backups: Or, Disabling Sync Writes for Time Machine (Data Integrity Implications?) OpenZFS	1	61	November 1, 2026
Redesigning pool with too wide vdevs TrueNAS	14	125	November 1, 2026
Apple Time Machine's Client Side Encryption vs. ZFS Compression and Snapshots: A brief Halloween Horror Story (or Mystery?) TrueNAS	3	67	November 1, 2026
[TrueNAS CE 25.10] Apple Time Machine Shares: One Multi-User Share, or Separate Shares for Each Mac Using Time Machine? TrueNAS	3	88	November 1, 2026
Snapshotting an (SMB Target) Apple TimeMachine Backup Dataset: How to Configure Snapshots? TrueNAS	6	481	November 1, 2026
[TrueNAS CE 25.10 or Later] Best Way to Export I/O Performance Metrics for Posting Here? TrueNAS	0	36	November 1, 2026
My Adventures with TrueNAS, ZFS, and Time Machine: A Master Post OpenZFS	0	43	October 31, 2026
zVault Experience zVault	4	699	October 29, 2026
Transitioning from zfs-auto-snapshot to sanoid/syncoid? Sanoid	3	81	October 28, 2026
Weird slowness issue OpenZFS	2	67	October 27, 2026
Way faster io_uring results with fio direct=1 over direct=0 with sync=1 on both read/write, and I don't understand how OpenZFS	1	65	October 25, 2026
What's everybody using for offsite backups? OpenZFS	8	309	October 19, 2026
Sane Default Snapshot Strategies for Various Workloads: Is there a list of these of a guide somewhere? OpenZFS	4	140	October 18, 2026
Santiy check: Low value data: 8x HDD RAIDZ1 vdev + 2x2 SSD stripe/mirror special vdev (RAID10) with ~2GB partition cut out for SLOG OpenZFS	3	78	October 17, 2026
Is overall performance degradation expected as the disk count increases in a single NVMe RAIDZ1 vdev with a fixed 32K volblocksize? OpenZFS	5	118	October 16, 2026
Pool performance degrades over the span of a week OpenZFS	7	123	October 15, 2026
Does migrating older Ubuntu desktop ext4 to ZFS make sense? OpenZFS	3	423	October 15, 2026
TRIM on SSD pools OpenZFS	4	324	October 10, 2026
Tooling for spotting "churning data" OpenZFS	7	177	October 4, 2026
Do you inherit encryption or create datasets as their own encryption root? OpenZFS	2	154	October 3, 2026
100% CPU usage on the "pv" command Sanoid	5	170	September 25, 2026
Help needed: ZFS, Proxmox, disk shelves, iSCSI, and too much hardware OpenZFS	4	161	September 24, 2026
Adding special mirror with different disk than pool's disks OpenZFS	5	155	September 24, 2026
[September 2026] OpenZFS Wiki - Workload Tuning Guidelines Changed? How Up to Date is This? OpenZFS	1	183	September 19, 2026

OpenZFS Topology FAQ: What's a zpool? What's a vdev?

faq

#Hi, ZFSers! If you’re new to ZFS, you’re probably not entirely solid on how the structure of the system works. This post is here to help, complete with lovely ASCII diagrams (that don’t require loading other links, sin…