Creating a pool with compression impossible when using -d option??

[kernschmelze]

When trying to find out what caused my zpool creation script to error out, I found that

zpool create -d -O compression=lz4 testpool

always fails: "cannot create 'testpool': operation not supported on this type of pool"

It fails differently with

zpool create -d -o feature@lz4_compression=enabled -O compression=lz4 testpool

Then the message is "cannot create 'testpool': feature 'lz4_compression' unsupported by kernel".

Another approach (-o version=28) is not viable, because "compatibility=GRUB2" is essential for ZFS on root.

So my question: How do I get the effect of -d or version options, so I can make sure the pools are readable and writable by other OSes also? Which other ways exist to avoid that all features are active?

[amotin]

Pools of version 28 did not yet support LZ4 compression, so the first failure is actually right. Before LZ4 default was LZJB, so you may try specifying it instead. Or if you don't care about specific algorithm, just use compression=on.

[kernschmelze]

Thank you!
That is a good, imho also intuitive explanation for the behavior with the -o version=28 option.

However, I do not yet understand the reason why the -d option does not allow re-enabling the compression methods option choice afterwards.

[no-usernames-left]

"compatibility=GRUB2" is essential for ZFS on root

Not if you're using ZFSBootMenu!