Date: Wed, 26 Dec 2012 19:21:00 -0800 From: Tim Kientzle <tim@kientzle.com> To: Ian Lepore <freebsd@damnhippie.dyndns.org> Cc: freebsd-arm@freebsd.org Subject: Re: Raspberry Pi questions Message-ID: <42B1C86B-F998-48DF-AA85-BB5250172E95@kientzle.com> In-Reply-To: <1356534197.1144.38.camel@revolution.hippie.lan> References: <1356466883.1144.8.camel@revolution.hippie.lan> <08125E73-C46A-4DDF-BFD8-59D5B86136B8@bluezbox.com> <1356476778.1144.20.camel@revolution.hippie.lan> <0F630E03-7A0C-4D56-A580-C7A9ABD2CB0C@bluezbox.com> <1356479705.1144.23.camel@revolution.hippie.lan> <B46B53E3-F555-4AE9-A5B4-FE2C33756C62@kientzle.com> <1356534197.1144.38.camel@revolution.hippie.lan>
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On Dec 26, 2012, at 7:03 AM, Ian Lepore wrote: > >> 2) Random failure to mount root. >> >> This is weird. If I insert the SD card into my Mac and open >> the MSDOS partition, then eject, the card will boot (sort of, >> see below). Otherwise, the kernel can't mount root. I'm >> entirely baffled. >> > > I had something like this happen several times yesterday. Most of the > time it boots fine, sometimes it fails to mount root from the sdcard, > but then it works on a reboot. I also saw the mmcsd0 driver ident line > say the bus was running at 50mhz several times, and I'm pretty sure I > wasn't using any SDHC cards, but that also wasn't the problem I was > pursuing so I didn't pay close attention. > > Of course, that doesn't seem to intersect with what you describe very > much at all, unless touching the card on the Mac wasn't really a cure, > it was just some misleading coincidence going on. Apparently it was just coincidence (that happened two times in a row!). I just tested a few more times and it now mounts root or not randomly even without mounting elsewhere in the middle. But I do see the correlation with probing the card at 25MHz (works) or 50MHz (fails). Tim
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