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Zfs file system windows2/17/2023 Snapshot A point-in-time state of the data that does not get changed when new data is written. ZVOL A special type of dataset of block storage (iSCSI or FC). Each Dataset can have child datasets with their own properties. Each Dataset can be snapshotted, cloned, and configured for its use case. Dataset A virtual filesystem without the restrictions of a fixed-size partition. It is used for detection and repair of data corruption continuously and via a “scrub” process. Checksum An additional integrity check on data that is written separately from the data. If a drive fails, the data is rebuilt (aka “resilvered”) to a spare drive. RAIDZ A RAID algorithm with either single (Z1), dual (Z2), or triple (Z3) parity for data protection. These drives can be striped, mirrored, or use RAIDZ. VDEV A top-level RAID “virtual device” comprising one or more drives. This pool is an aggregation of one or more vdevs. Pool A collection of drives used for a single ZFS filesystem. ZFS is Enterprise-grade and highly scalable, requiring new concepts and terminology to differentiate its practices from standard filesystems:
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