The classic trigger for corruption problems (especially w. SD cards) is sudden power off events. I believe we now have the ability to tell the EC to auto-power on the laptop, so you can just plug it into a lamp timer set to cycle on/off every ten minutes or so and let it run...
When you say that the entire 11.2.0 development cycle was done with ext4, was that released and abused extensively ? Cheers, wad On Sep 7, 2011, at 11:06 AM, Martin Langhoff wrote: > A quick heads up -- we've seen Jon Nettleton hit some disk corruption > repeatedly on his development/test machine. Diagnosis of the prob led > us to http://dev.laptop.org/ticket/11210 (erase-blocks doesn't work > with Toshiba eMMC devices - which is what we have on SKU 198 - > membrane kb units) but it is unclear whether that is the issue. > > This is one of our current risks -- it is a concern because we need to > know real soon whether this is a hw issue (related to the eMMC parts) > or not. We have hit corruption issues with ext4 in the past (#9513) > and fell back to ext3. It is not clear however that ext4 is suspect: > the whole 11.2.0 dev cycle was done under ext4 and no disk corruption > incidents were reported AFAIK. > > From IRC discussion -- he seemed to hit it while: > - developing, compiling, > - using an ext SD card > - running a patched kernel and xorg > - presumably crashing a lot > > We need to consider action around this > > - try to force the error -- I'll set up a test rig for this, applying > unclean shutdowns on a couple of SKU198 units > - keep our eyes open for disk corruption reports, specially in builds > including the new gfx code > - potentially switch back to ext3 in OOB > > It is very hard to prove a negative - tracking this at > http://dev.laptop.org/ticket/11220 > > cheers, > > > > m > -- > [email protected] -- Software Architect - OLPC > - ask interesting questions > - don't get distracted with shiny stuff - working code first > - http://wiki.laptop.org/go/User:Martinlanghoff > _______________________________________________ Devel mailing list [email protected] http://lists.laptop.org/listinfo/devel
