Date: Wed, 18 Nov 2009 21:06:04 -0600 From: Adam Vande More <amvandemore@gmail.com> To: Glen Barber <glen.j.barber@gmail.com> Cc: questions@freebsd.org Subject: Re: Loader does not load after reinstall with previous mirrored disk attached Message-ID: <6201873e0911181906t9ba2699kbc48ad2940f88159@mail.gmail.com> In-Reply-To: <4ad871310911181835n7b72dde1o22c73ec86dcc6c12@mail.gmail.com> References: <4ad871310911181835n7b72dde1o22c73ec86dcc6c12@mail.gmail.com>
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On Wed, Nov 18, 2009 at 8:35 PM, Glen Barber <glen.j.barber@gmail.com>wrote: > Hello, > > First off, this is not a real "I need help" post, though there are a > few questions that I'd like to get insight on, if possible - it is > more for informative purposes in the archives, should someone run into > this very random problem in the future. Additionally, I believe this > is far too unlikely this will happen to many others to consider it to > be a "problem", thus submitting a PR. > > The story, cut down from its original 3 hour length: > > For some time, I was dual-booting OpenSolaris and FreeBSD, on 500GB > SATA and 250GB IDE disks, respectively. When I lost the need to run > OpenSolaris (Flash), I purchased a second 500GB SATA disk. I added > the original SATA disk to gmirror, and synced the 250GB FreeBSD > install to the 500GB SATA drive. Once that finished, I removed the > 250GB disk, and installed the second 500GB disk, adding it to the > mirror. > > All was fine, except I was not using all of the drive space available. > This past weekend, I decided to create a slice to cover the remaining > 250GB, initially to try ZFS, which failed for the following reason. > Here is where question 1 comes into play. > > 1.) What is the correct way to completely break a gmirror setup, > replacing /dev/mirror/gm0 with the original /dev/adN configuration? > Is the assumption that once you initialize gmirror, you will never > need/want to go back to a single disk setup? Is there a clean way to > fix boot0 so it does not look for a mirror, short of > 'vfs.root.mountfrom' in loader.conf? > I usually find this easier to run from fixit cd. I don't remember exact order but something like deactivate stop clear. clear is last for sure because that will remove metadata. Remember to change fstab. -- Adam Vande More
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