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Date:      Sun, 16 Aug 2015 20:33:03 +0200
From:      Polytropon <freebsd@edvax.de>
To:        John Howie <john@thehowies.com>
Cc:        "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org>
Subject:   Re: ada disk now da disk in upgrade to 10.2 Release?
Message-ID:  <20150816203303.7f551b4b.freebsd@edvax.de>
In-Reply-To: <37CD6FAB-CA35-48D2-B8B0-342DE72B70CE@thehowies.com>
References:  <480CDD91-7457-4E11-B614-934F5B66FBCB@thehowies.com> <20150814225109.279f0c29.freebsd@edvax.de> <978FAFAC-5DBB-4464-B7DE-81F8DFF63E84@thehowies.com> <37CD6FAB-CA35-48D2-B8B0-342DE72B70CE@thehowies.com>

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On Sun, 16 Aug 2015 17:51:04 +0000, John Howie wrote:
> Hi all,
> 
> Following up.
> 
> I verified that no changes have been made to the HyperV Cluster,
> and that no changes were made to /etc/fstab in the upgrade.

This file has no influence to how devices are being recognized.
But as you mention it: Have you thought about adding labels to
the partitions? It's a convenient way to abandon device names.
Use the label to refer to the file system.

You can find some informatio here:

http://www.wonkity.com/~wblock/docs/html/labels.html

https://www.freebsd.org/doc/handbook/geom-glabel.html

It's easy to add them afterwards. No need to start over.



> The virtual machine (10.1-RELEASE) was installed on the HyperV
> Cluster from 10.1-RELEASE media, which created the ada disks
> and partitions (I do remember there being difficulty in setting
> the boot partition as active, and having to mark it manually).

The installer _should_ be able to do this, but of course
there is no problem to go to CLI and do it manually. It's
not that this is a complicated task... :-)

However, if a disk has been set as active, it doesn't matter
as which device _type_ it's being recognized - it will boot,
given that the BIOS (or in your case, the hypervisor) will
transfer boot control to it. A partition marked as bootable
will fulfill that requirement. From there on, labels are a
convenient way to refer to the file system in further steps
of the boot process (mounting root file system, mounting
other file systems).



-- 
Polytropon
Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...



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