Revert "test ramdisk"

This reverts commit 363e4681e40751e7ba429d61f15e611f5c213613.
Revert "Update ramdisk"

This reverts commit 599494e8a87b751fe2e7d703d2ecd2c9aebfb789.
Revert "Update ramdisk"

This reverts commit 3ad43b118f87cea4eecc87c0f19fd897128274a9.
Ramdisk perfect 4.4.2