Date: Wed, 8 Jun 2016 09:35:13 -0700 From: Russell Haley <russ.haley@gmail.com> To: Erich Dollansky <erichsfreebsdlist@alogt.com>, Lou Katz <pi@metron.com> Cc: freebsd-arm <freebsd-arm@freebsd.org> Subject: Re: Root on USB stick Message-ID: <CABx9NuQKVzt3A-PEratCn7UxFRyKOMJf-QM4KaomJfgXg6ceaA@mail.gmail.com> In-Reply-To: <CABx9NuS=n1fyNedUSyK3L-Ht=VmyzsDYdOKFFZa0TzE9Uq=uGw@mail.gmail.com> References: <20160606063242.GA9594@metron.com> <20160608183545.37198952@X220.alogt.com> <20160608155617.4640851.69458.7032@gmail.com> <CABx9NuS=n1fyNedUSyK3L-Ht=VmyzsDYdOKFFZa0TzE9Uq=uGw@mail.gmail.com>
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On Wed, Jun 8, 2016 at 9:31 AM, Russell Haley <russ.haley@gmail.com> wrote: > On Wed, Jun 8, 2016 at 8:56 AM, Russell Haley <russ.haley@gmail.com> wrot= e: >> Sorry top post only on my phone and I'm trying to remember from a year a= go without my notes... >> >> Isn't rootfs something that we can pass through u-boot variables?=E2=80= =8E I'm sure I've done it but I can't remember how... > > Okay, that was the ftd file, sorry. :( > >> >> I also seem to remember that if ubldr can't find the rootfs it prompts f= or you to enter something manually=E2=80=8E, which might be good enough for= development purposes? Or am I imagining that? I remember the prompt, but n= ot what process launched it. > > Also wrong, The prompt I am thinking of is loader looking for the > kernel: from loader(8) > > https://www.freebsd.org/cgi/man.cgi?query=3Dloader&apropos=3D0&sektion=3D= 0&manpath=3DFreeBSD+10.3-RELEASE+and+Ports&arch=3Ddefault&format=3Dhtml > > load [-t type] file ... > Loads a kernel, kernel loadable module (kld), disk image, or file > of opaque contents tagged as being of the type type. Kernel and > modules can be either in a.out or ELF format. Any arguments > passed after the name of the file to be loaded will be passed as > arguments to that file. Use the md_image type to make the kernel > create a file-backed md(4) disk. This is useful for booting from > a temporary rootfs. Currently, argument passing does not work > for the kernel. > > > *Note that man says we cannot pass arguments to the kernel. ***Sorry, accidentally sent without being complete: I would say your best bet is to use crochet and create a new image and tweek the kernel conf file manually. Crochet is here: https://github.com/freebsd/crochet and supports RPi2, though I've never used it. The kernel conf file is https://svnweb.freebsd.org/base/head/sys/arm/conf/RPI2?view=3Dmarkup and the line to tweek is: options ROOTDEVNAME=3D\"ufs:mmcsd0s2\" Good luck! Russ > > > > >> Original Message >> From: Erich Dollansky >> Sent: Wednesday, June 8, 2016 3:52 AM >> To: Lou Katz >> Cc: freebsd-arm@freebsd.org >> Subject: Re: Root on USB stick >> >> Hi, >> >> On Sun, 5 Jun 2016 23:32:42 -0700 >> Lou Katz <pi@metron.com> wrote: >> >>> Where does the FreeBSD boot loader for Pi2 know about or find out >>> where the root partition is? I need to boot from an image in the >>> micro slot that I cannot remove (because I broke the push-pull >>> mechanism) but use a root parition on another card accessed through a >>> USB port. >>> >>> There seems to have been a way to do this with FreeBSD 10, but I >>> cannot find it in FreeBSD 11. >>> >>> Thank you >> >> there is an entry in the kernel configuration file where to find root >> by default. >> >> But you would need a custom kernel for this. >> >> Erich >> _______________________________________________ >> freebsd-arm@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-arm >> To unsubscribe, send any mail to "freebsd-arm-unsubscribe@freebsd.org"
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