[oi-dev] Filesystems that both Unix and Linux can read

[Bob Friesenhahn]

If you are able to create the original zfs pool and filesystem format
supported by Solaris 10 or OpenSolaris (before feature flags), then that
should be a useful baseline which should work for Solaris, Illumos,
FreeBSD, and Linux. That is provided that the OpenZFS implementations are
respectful and do not automatically upgrade the pool version, or veer
outside the bounds of the original specification. OpenSolaris and Illumos
introduced the original feature flags so many of the feature flags should
work with derivative zfs implementations.

There is no substitute for testing!

Bob


On Sat, Aug 16, 2025, 6:22 PM Atiq Rahman <atiqcx at gmail.com> wrote:

> Hi,
> A file system related generic question:
>
> I am looking to keep one of my GPT Partitions on my disk to be a file
> system that both Illumos (Solaris) / FreeBSD and Linux can read. This will
> be primarily to store data. I know there's vfat (fat32). Wanna know if
> there's anything better (non-MSFTish) out there.
>
> Other than exfat, fat32 what else do we have?
>
> I started using openzfs (which is at version 2.3.3 rn) on linux. However,
> there's probably a version difference with Illumos/OI.
> Since, I couldn't complete the OI setup on my machine yet I don't know
> what version of zfs we are using on OI. I am not quite sure if zfs will be
> a viable option due to lack of compatible versions (openzfs on linux and
> ZFS on illumos).
>
>
> Best!
>
> Atiq
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