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| zfs [2025-06-28 13:20] – weichbr | zfs [2025-11-27 14:06] (current) – weichbr |
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| === Create a pool === | === Create a pool === |
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| * Get disk ids from ''/dev/disk/by-id'' | * Get disk ids from ''/dev/disk/by-id'', do not use ''/dev/sdX'' |
| * ''zpool create <name> <type> <disks>'' | * ''zpool create <name> <type> <disks>'' |
| * ''zpool create ssds mirror nvme-Samsung_SSD_980_TB_ABCD nvme-Samsung_SSD_980_TB_EFGH'' | * Example: ''zpool create ssds mirror nvme-Samsung_SSD_980_TB_ABCD nvme-Samsung_SSD_980_TB_EFGH'' |
| * Don't set ''ashift'', let zfs figure it out. You can check with ''zdb -C <pool>'' what value it uses. | * Don't set ''ashift'', let zfs figure it out. You can check with ''zdb -C <pool>'' what value it uses. |
| * Only set it, if it's wrong. ''ashift=12'' for 4K physical sectors | * Only set it, if it's wrong. ''ashift=12'' for 4K physical sectors |
| * Set ''autotrim=on'' for SSDs | * Set ''autotrim=on'' for SSDs |
| | * When creating a pool ''-o'' is for pool options. To pass options to the root dataset, use ''-O''. |
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| | A good set of defaults for a new pool: |
| | ''-o autotrim=on -O acltype=posixacl -O xattr=sa -O normalization=formD -O compression=zstd -O atime=on -O relatime=on'' |
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| === Create a dataset === | === Create a dataset === |
| * Enable comporession: ''-o compression=zstd'' | * Enable comporession: ''-o compression=zstd'' |
| * ''recordsize'' of 128K is default. When storing large files, e.g., media, set this higher, e.g., 1M | * ''recordsize'' of 128K is default. When storing large files, e.g., media, set this higher, e.g., 1M |
| * | |