Thread: N900: No eMMC and how to install Maemo to microSD
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NIN101 is offline NIN101
2011-10-15 , 17:35
Posts: 115 | Thanked: 342 times | Joined on Dec 2010
#51
It's on my "sometime-todolist", but currently I have no motivation to do it.
Keeping the rootfs on NAND and moving /home/ and /home/user/MyDocs to the sd is not installing maemo on sd.

The basic steps to do it would be the following:

1) Recompiling the kernel to support mounting from sd card. You must adjust the kernel command line to mount the rootfs from sdcard and not from NAND. This functionality must be compiled into the kernel and mustn't be outsourced to kernel modules (except one would use an initrd).
NIN's lab did it. I booted with the maemo kernel an EXT4 linux rootfs on sd. Here should be the relevant parts of the config used for that kernel:

Code:
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_LBD=y
CONFIG_LSF=y
CONFIG_MTD_BLKDEVS=y
CONFIG_MTD_BLOCK=y
CONFIG_MMC=y
CONFIG_MMC_BLOCK=y
CONFIG_MMC_OMAP_HS=y
CONFIG_EXT4_FS=y
CONFIG_EXT4_FS_XATTR=y
CONFIG_EXT4_FS_POSIX_ACL=y
CONFIG_JBD2=y
CONFIG_FS_MBCACHE=y
CONFIG_FS_POSIX_ACL=y
2) Copying the rootfs to sd.
2) Editing the bootscripts (e. g. s/mmcblk0/mmcblk1/ if you want to move /home/, MyDocs too)

3) Dealing with suprises not foreseeable yet.
__________________
Video showing N900 booting with LUKS encrypted /home/
N900 rescueOS
 

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