Unfortunately, no one can be told what Redcore Linux is. You have to see it for yourself!
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zfs is broken (again).
My guess is the default kernel is too new for the zfs drivers.
Maybe the solution is to install an older kernel and pin it down.
No idea how i can do that.
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You're right, zfs is not compatible with kernel 6.11. If you wanna use it, is best to stick to a LTS kernel.
sisyphus install linux-image-redcore-ltsOffline