I am seeing rare SD card write corruption on DM355 running 2.6.36. The system will get itself into a state where it appears all SD writes are offset by two bytes. This is using a vfat filesystem on the SD, and affects the FAT and directories at least.
When I look at the contents of the SD card, corrupt sectors start with two bytes of junk which looks like the end of the previous sector write, then valid data (but shifted up two byte places), with the last two bytes missing - they seem to get written at the start of whatever sector gets written next. When the system is in this state I can umount and change cards, mount, touch a file and unmount and it repeatably corrupts the sector containing the directory entry. Unfortunately after a reboot everything works fine again, I haven't found a repeatable way to get the system back into the corrupting state. I have seen this happen on at least two separate occasions now and was not doing anything particularly abusive or unusual this time, so I know now this is real and needs to be fixed. I am going to look at git history since 2.6.36 to see if anything looking like a fix has been committed, will also try banging on things to reproduce the problem. But if anyone has any similar experiences, comments, suggestions they would be most welcome. Thanks. -- Jon Povey [email protected] Racelogic is a limited company registered in England. Registered number 2743719 . Registered Office Unit 10, Swan Business Centre, Osier Way, Buckingham, Bucks, MK18 1TB . The information contained in this electronic mail transmission is intended by Racelogic Ltd for the use of the named individual or entity to which it is directed and may contain information that is confidential or privileged. If you have received this electronic mail transmission in error, please delete it from your system without copying or forwarding it, and notify the sender of the error by reply email so that the sender's address records can be corrected. The views expressed by the sender of this communication do not necessarily represent those of Racelogic Ltd. Please note that Racelogic reserves the right to monitor e-mail communications passing through its network _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
