Date: Thu, 27 Nov 2008 11:45:10 +0100 From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no> To: "Peter Steele" <psteele@maxiscale.com> Cc: freebsd-hackers@freebsd.org, Mike Meyer <mwm@mired.org> Subject: Re: FreeBSD boot menu is missing Message-ID: <861vwx4fd5.fsf@ds4.des.no> In-Reply-To: <2ACA3DE8F9758A48B8BE2C7A847F91F240CEB4@polaris.maxiscale.com> (Peter Steele's message of "Wed, 26 Nov 2008 16:53:11 -0800") References: <2ACA3DE8F9758A48B8BE2C7A847F91F240CE6B@polaris.maxiscale.com> <20081126153510.6062cd55@bhuda.mired.org> <2ACA3DE8F9758A48B8BE2C7A847F91F240CE99@polaris.maxiscale.com> <20081126190545.17b79195@bhuda.mired.org> <2ACA3DE8F9758A48B8BE2C7A847F91F240CEB4@polaris.maxiscale.com>
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"Peter Steele" <psteele@maxiscale.com> writes: > Man, I wish I'd known this. I built a whole automated framework around > this, assuming you couldn't set up the initial mirror drive with a live > file system. I'll have to try your solution; it is definitely the way to > go. We are dealing with identical size drives as well so this shouldn't > be a problem. Just make sure you leave a few unallocated blocks at the end of the disk (for gmirror metadata). In most cases, this happens automatically, because the size of the disk is not a multiple of the (fake) cylinder size. To pick one at random, I have a Maxtor 6B300S0 here with 586112591 LBA sectors where the fake c/h/s geometry only adds up to 586111680 sectors, leaving 911 sectors at the end. > We don't want to mirror the whole drive, just the OS partitions. I > decided to go with the full slice mirroring because of what was > described in this link. If mirroring the partitions in the slice is the > better way to go, then that's fine my me.=20 Mirroring the entire slice is far simpler. If you mirror individual partitions, you have to label them *before* you newfs them. I would mirror the whole drive, though - and I would use ZFS, with which you can easily transition to larger drives (just replace them one by one and resilver in between - you can even do it online if your disks are hot-swappable) DES --=20 Dag-Erling Sm=C3=B8rgrav - des@des.no
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