ZFS root on single SSD?

[Fabian Keil]

mtiger <mtiger090 at gmail.com> wrote:

> I have a similar situation. I have a nice ssd i am using through a usb 
> port. I can't install this ssd internally because there are no free sata 
> ports nor mounting slots. I would like to use ZFS on it, but I can't get 
> it to boot using the  ZFS options from the installer. I'm trying to use 
> version 11 memstick image of the FreeBSD installer.
> 
> Now if I leave the install media (on a usb flash drive) connected I can 
> boot the drive setup as ZFS no problem. If i remove the install media 
> and try to boot I get an error telling me it can't mount root. Power the 
> system on and off and the problem is still the same.
> 
> If I do the same installation and select UFS everything works fine every 
> time no matter what usb devices I'm using or have connected.
> 
> I've tried this on several machines but always with the same result. 
> I've also had the same result using usb external hard drives.
> 
> I've been through the handbook time and time again. I also get the same 
> problem if I install TrueOS which is using 12-Current. As long as the 
> install media is still connected it will boot the other drive setup for 
> ZFS. If I disconnect the install flash drive it will not boot.

The behaviour you describe could be the result of this bug:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=208882

Fabian
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