Re: misleading ZFS warning

Reply: Anthony Pankov : "Re: misleading ZFS warning"
In reply to: Anthony Pankov : "misleading ZFS warning"
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From: Ronald Klop <ronald-lists_at_klop.ws>
Date: Wed, 22 Jul 2026 15:12:00 UTC

What is underlying pool structure?
Zraid/mirror/single disk?

If zraid, what is the stripesize?

Regards,
Ronald

Van: Anthony Pankov <anthony.pankov@yahoo.com>
Datum: 22 juli 2026 11:51
Aan: fs@FreeBSD.org
Onderwerp: misleading ZFS warning

> 
> 
> Hello,
> 
> Doing this:
> 
>  zfs create  -b 4096 -o volmode=dev  -V 32G as1/dockerim/dsk.adocker
> 
> I've got
> 
> Warning: volblocksize (4096) is less than the default minimum block size (16384).
> To reduce wasted space a volblocksize of 16384 is recommended.
> 
> While ashift=12 for this pool I can't understand am I really do something wrong and there will be "wasted space" or this is a misleading warning.
> 
> Can somebody enlight this?
> 
> -- 
> Best regards,
>  Anthony Pankov                         mailto:anthony.pankov@yahoo.com
> 
> 
> 
> 
> 
>