Dualboot and ZFS

Victor Sudakov vas at mpeks.tomsk.su
Mon Jan 15 14:47:57 UTC 2018

Manish Jain wrote:
> > Sorry if my question was misleading, I did not mean converting the
> > existing system from UFS to ZFS at ada0s3. Suppose ada0s3 is an unused
> > slice, I can probably create a zpool thereon. But a few questions
> > remain:
> > 
> > 1. Can I install a root-on-zfs system on ada0s3 with bsdinstall? I
> > suppose not?
> That's right. You cannot install ZFS onto an MBR slice. ZFS by default 
> needs an entire disk, partitioned GPT.

However, later you suggest it's possible to install freebsd-zfs on a
BSD slice. How is that?

> > Why are you creating a zpool within a BSD "a" partition, and not in
> > da0s1 directly? I have never seen such a configuration. Is it even
> > possible to set the "freebsd-zfs" type on a BSD partition?
> I presume you are using MBR partitioning. Under MBR, freebsd slices are 
> always nested. The slice contains partitions denoted with a, b and so on.
> I do not think it is viable to set freebsd-zfs on an MBR slice. It just 
> will not work. ZFS needs an entire disk. If you wish to install on an 
> MBR slice, you must use rsync after installing freebsd-UFS.

Do you mean to say it's viable to install freebsd-zfs on ada0s3a but
not viable on ada0s3 ? I don't see logic here.

Victor Sudakov,  VAS4-RIPE, VAS47-RIPN

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