Which filesystem is known for copy-on-write with checksums, snapshots, and pooled storage?

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Multiple Choice

Which filesystem is known for copy-on-write with checksums, snapshots, and pooled storage?

Explanation:
Copy-on-write with checksums, snapshots, and pooled storage are hallmark features of ZFS. With copy-on-write, updates don't overwrite existing blocks; instead, new blocks are written and only after they're safely stored is the old data considered updated, which helps guarantee data integrity even if a crash occurs during writes. Every block and metadata in ZFS carries a strong checksum, so the system can detect corruption and repair it using redundant copies within the storage pool. Snapshots are lightweight point-in-time captures that share unchanged data blocks, enabling easy rollback and cloning without duplicating data. Pooled storage means disks are combined into a single storage pool that ZFS manages, allowing flexible, efficient allocation, dynamic expansion, and built-in redundancy across the pool. These combined capabilities are what set ZFS apart from other filesystems.

Copy-on-write with checksums, snapshots, and pooled storage are hallmark features of ZFS. With copy-on-write, updates don't overwrite existing blocks; instead, new blocks are written and only after they're safely stored is the old data considered updated, which helps guarantee data integrity even if a crash occurs during writes. Every block and metadata in ZFS carries a strong checksum, so the system can detect corruption and repair it using redundant copies within the storage pool. Snapshots are lightweight point-in-time captures that share unchanged data blocks, enabling easy rollback and cloning without duplicating data. Pooled storage means disks are combined into a single storage pool that ZFS manages, allowing flexible, efficient allocation, dynamic expansion, and built-in redundancy across the pool. These combined capabilities are what set ZFS apart from other filesystems.

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