ZFS On Linux

[Tom H]

On Tue, Mar 31, 2015 at 10:33 AM, compdoc <compdoc at hotrodpc.com> wrote:
>>
>> Has anyone here got any experience with ZFS On Linux? I need to
>> occasionally mount, read and write a disk that will primarily be in a
>> FreeBSD system.
>
> I use ZOL on Ubuntu Server and it works very well, however, I use it for
> several large raidz2 arrays and one mirror. I'm not sure it has an advantage
> used on a single disk.
>
> There are no other file systems on the arrays. For example, they aren't
> formatted with ext4 or anything other than ZFS. I share them using samba,
> and copy files to them with rsync. I also store VM files on them for
> machines running in qemu-kvm.
>
> FreeBSD file systems do seem a bit strange, and I'm not sure a FreeBSD drive
> can be mounted on an Ubuntu system. (haven't had the need to try very often)

There's nothing strange with FreeBSD filesystems and FreeBSD UFS
filesystems can be easily mounted r/o on Ubuntu.

To the OP: I'm only familiar with ZFS on Solaris but, AFAIK, ZFS on
FreeBSD might have options set that aren't available in ZFS on Linux.
So I'd check what options are set before mounting your FreeBSD ZFS
volumes in Ubuntu. With one proviso. My information might be out of
date because the FreeBSD, Illumos, Linux, and OpenIndiana ZFS
developers have joined their efforts under the umbrella of OpenZFS so
differences versions/features/options might have been
reduced/eliminated.