RAIDZ
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RAIDZ1 vs RAIDZ2: Parity, Resilver Risk, and Which to Pick
RAIDZ1 survives one disk failure, RAIDZ2 survives two. What that means for usable capacity, resilver risk, and how to choose at each vdev width.
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TrueNAS Pool Import Failed or I/O Suspended: zpool Fixes
Decode zpool import states, reconnect missing disks, roll back after a crash, clear suspended I/O, and import read-only to copy your data off.
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ZFS RAIDZ vs Mirror: Capacity, IOPS, and Resilver Risk
Choose 6- to 8-wide RAIDZ2 for media and bulk storage, or two-way mirrors for VMs and databases. Compare usable capacity, fault tolerance and growth.