Date: Fri, 3 Jul 2015 12:00:26 -0700 From: Tim Kientzle <tim@kientzle.com> To: Glen Barber <gjb@FreeBSD.org> Cc: Hellmuth Michaelis <hm@hellmuth-michaelis.de>, freebsd-arm <freebsd-arm@FreeBSD.org> Subject: Re: Once Booted from MMC, eMMC not found Message-ID: <2608C773-A5D6-4828-8984-EB1A4205197F@kientzle.com> In-Reply-To: <20150703044622.GE6532@FreeBSD.org> References: <1435812471361-6022231.post@n5.nabble.com> <20150702050306.GD45214@FreeBSD.org> <20150702050634.GE45214@FreeBSD.org> <462071B7-1D51-45CC-B69C-E59EA36DA729@me.com> <6C705C95-D95D-4207-B23A-01CD0E583426@hellmuth-michaelis.de> <20150702143542.GD53770@FreeBSD.org> <9012912E-229D-4F70-9CCD-A156E80D6CED@kientzle.com> <20150703044622.GE6532@FreeBSD.org>
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> On Jul 2, 2015, at 9:46 PM, Glen Barber <gjb@FreeBSD.org> wrote: >=20 > Hi Tim, >=20 > On Thu, Jul 02, 2015 at 09:40:22PM -0700, Tim Kientzle wrote: >>> On Jul 2, 2015, at 7:35 AM, Glen Barber <gjb@FreeBSD.org> wrote: >>>=20 >>> I'm curious - is this even necessary to do anymore? >>>=20 >>> My latest tests (11-CURRENT and 10-STABLE) of BeagleBone Black = images >>> "just boot." >>>=20 >>> Maybe I don't understand what this script is supposed to fix. Can >>> someone clarify that for me? >>=20 >> The script just copies a running system booted from SD onto the eMMC = so that a BBB can boot without an SD card. >>=20 >> The script just does the following: >> * Erases the eMMC >> * Reformats it >> * Copies boot files from SD to eMMC >> * Copies / from SD to eMMC (excluding a few things like /usr/src, = /usr/obj that are unlikely to fit) >> * Tweaks a few configuration parameters on the copied system >>=20 >=20 > Ah, okay, this is the part I was missing. I misunderstood what the = eMMC > did overall, and wasn't sure how this interacted with the system in > whole. The eMMC chip is connected to the second SD/MMC interface on the SoC. = To the kernel, it should look just like a second SD/MMC card on the = second interface. BBB can boot from eMMC to create a nice self-contained system. At one = time, Crochet=E2=80=99s BBB images could be easily copied to eMMC to = boot from there without an SD card, but this doesn=E2=80=99t seem to = work anymore due to changes in FreeBSD somewhere. I stopped using the eMMC for booting myself simply because 2GB wasn=E2=80=99= t enough for the things I was trying to do. There are now BBB with 4G = eMMC chips, so that may be worth looking into again. Tim
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