解决android 无法找到ext文件系统的问题

这几天烧写S5pv210 的SDMMC 启动的android系统，发现

看到信息有提示
[    2.181488] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
[    2.191716] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)
[    2.199377] EXT4-fs (mmcblk0p3): VFS: Can't find ext4 filesystem
[    2.215952] EXT4-fs (mmcblk0p4): warning: checktime reached, running e2fsck is recommended
[    2.225034] EXT4-fs (mmcblk0p4): recovery complete
[    2.228345] EXT4-fs (mmcblk0p4): mounted filesystem with ordered data mode. Opts: (null)
[    2.254994] init: Unable to open persistent property directory /data/property errno: 2
[    2.268388] init: cannot find '/system/etc/install-recovery.sh', disabling 'flash_recovery'
[    2.304904] enabling adb
[    2.306810] Enabled => usb_mass_storage 
[    2.309905] Enabled => adb 
[    2.334174] adb_open
sh: can't access tty; job control turned off
# [    2.470669] warning: `rild' uses 32-bit capabilities (legacy support in use)
[    2.624955] PVR_K:(Warning): SysFinalise: Version string: SGX540 S5PC110 [478, drivers/gpu/pvr/s5pc110/sysconfig.c]
[    2.984120] request_suspend_state: wakeup (3->0) at 2454896503 (2010-01-01 12:00:02.474233835 UTC)
[    3.001533] init: untracked pid 49 exited
[    3.006286] init: untracked pid 53 exited
[    3.407552] android_usb gadget: high speed config #1: Android Composite
[    7.120287] request_suspend_state: wakeup (0->0) at 6591063711 (2010-01-01 12:00:06.610400585 UTC)
[    7.130380] init: untracked pid 68 exited
[    7.133008] init: untracked pid 69 exited

然后就不停的打印下面的东西，无法进入android界面了。
[   12.255154] request_suspend_state: wakeup (0->0) at 11725931752 (2010-01-01 12:00:11.745267834 UTC)
[   12.265300] init: untracked pid 80 exited
[   12.267889] init: untracked pid 81 exited


表面上就是ext4 文件系统没挂载成功，为什么呢？烧写个十几次，有时候又能挂载启动成功。why？
以前记得烧写过蛮多次，都是很稳定的。

解决办法

http://bbs.eeworld.com.cn/thread-373057-1-1.html