Moving boot disk - does not seem easy?
roberthuff at rcn.com
Thu Sep 12 23:33:12 UTC 2019
Karl Denninger writes:
> On 9/12/2019 16:26, james wrote:
> > I had thought that this would be straightforward but it seems not.
> > I have a freebsd 12 system, UFS boots /ada0p2. Mounts some ZFS
> > partitions and I'm away.
> > I add a new PCIe card with a SATA SSD, and it grabs ada0.
> > I want to move my boot to the SSD, not least because the boot priority
> > now favours it as ada0, and I had to manually boot ada1p2.
> > There's not much on ada1p2 now, but I want the new ada0p2 to be
> > smaller, so dd is not attractive.
> > What's the easiest way to set ata0 to be much like ada0p2 was (given
> > that I booted from ada1p2)?
> > Ideally I'd like boot and swap etc set up as well, which I kinda did
> > already with sade.
> > I already had the issue with freebsd-install/MANIFTEST missing and did
> > a basic install to ada0, but it seems a bit naff to unmount all my ZFS
> > mountpoints just to tar across all the rest of it.
> > Any pointers?
> I've done this many times and it's very easy.
> Look at the old disk (e.g. "gpart ada1" and friends) so as to get the
> proper partition settings (e.g. sizes, etc)
> Use gpart to set up the NEW disk with the same basic configuration
> (slice types, etc.) -- it is, of course, ok to change the sizes --
> it's just important that the data on the old disk fits.
Use gpart to label the new disk - call it, say, "root".
<rest of copying instructions deleted>
In fstab, replace however you currently mount / with:
/dev/gpt/root / ufs rw 1 1
changing "ufs" to "zfs" if appropriate.
Power down system; unhook old drive; start system. Things should
More information about the freebsd-questions