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zfs: special device: update maximum for special_small_blocks
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In ZFS 0.8.3, the limit was increased to 1M [0][1].

[0] https://github.com/openzfs/zfs/releases/tag/zfs-0.8.3
[1] openzfs/zfs#9355

Signed-off-by: Fiona Ebner <[email protected]>
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foxmox authored and ThomasLamprecht committed Sep 16, 2022
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Expand Up @@ -694,7 +694,7 @@ WARNING: Adding a `special` device to a pool cannot be undone!

ZFS datasets expose the `special_small_blocks=<size>` property. `size` can be
`0` to disable storing small file blocks on the `special` device or a power of
two in the range between `512B` to `128K`. After setting the property new file
two in the range between `512B` to `1M`. After setting the property new file
blocks smaller than `size` will be allocated on the `special` device.

IMPORTANT: If the value for `special_small_blocks` is greater than or equal to
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