Installing to NAND

c4tricoueltm

Auto Installer

WARNING: The content of this section is considered DEPRECATED and OBSOLETE It is preserved for historical or documenting reasons. The data in this page is out of date. There are better methods now. Please see Autoreinstallation image Overview This page describes how to write a filesystem to the board's internal NAND flash and boot from it using LinuxBIOS. Requirements You should have a working install of one of the OLPC Build images, build 79 or higher, and a copy of the corresponding jffs2.img for that build available. (For example, on another USB key, or on another partition of the same key if it is larger than 512M.) Procedure After the board has booted, hit ctrl+alt+F1 to get to a login prompt, and login as root. Then: modprobe mtdchar flash_eraseall -j /dev/mtd0 nandwrite -p /dev/mtd0 /path/to/olpc-development-rpm-jffs2.img We intend to provide a mechanism to let the jffs2 img be streamed to nandwrite over the network, for people with only one USB key; this isn't working currently, though. It is normal to see bad block errors during both the flash_eraseall; NAND flash comes from the factory with bad blocks marked. You may also see error messages during the nandwrite step. When the nandwrite has finished you can reboot, and LinuxBIOS will boot from the NAND flash. Troubleshooting flash_eraseall: /dev/mtd0: No such file or directory This is seen when modprobe mtdchar wasn't performed. NOTE: You'll get the very same error if you don't Upgrade to LinuxBIOS first. I see a hang after "NOTICE: Booting default" This is normal: the filesystem on the NAND flash is being uncompressed. It should last for around 80 seconds. (Yes, this is slow! The Geode's flash-memory controller performance is very slow. On future boards—the production hardware—we'll have a separate flash-memory controller that will be providing an order of magnitude greater performance.) JFFS2 warning: (1381) jffs2_sum_write sumnode: Not enough space for summary, padsize = -793 This warning is harmless. Skipping bad block at 0xnnnn0000 During flash_eraseall, this is normal. See procedure section above. Timing Flash_eraseall takes roughly 14 seconds, Nandwriteandwrite takes roughly 54 seconds when the input file is taken from a USB 2.0 key.