Nonvolatile storage device and operating system (os) image program method thereof

A method of loading data in a nonvolatile storage device, the method comprising:

• receiving a write request of the data;
• activating a reliable mode of the data based on coincidence of an information accompanied by the write request and a size information stored in the nonvolatile storage device;
• and
• writing the data to a first memory area of the nonvolatile storage device,
• wherein while the reliable mode is activated, a migration of the data from the first memory area to a second memory area is blocked,
• wherein the first memory area is configured to store m-bit per cell and the second memory area is configured to store n-bit per cell, each of the m and n is equal to 1 or greater than 1, and the m is smaller than the n.

A method of programming an operating system OS image data in an embedded memory card, the embedded memory card including a first register and a second register, the method comprising:

• setting a value in the first register to support a reliable mode;
• setting an OS image information to the second register, the OS image information including a size information of the OS image data;
• activating the reliable mode in response to receiving the OS image data;
• programming the OS image data into a first storage area of the an embedded memory card while the reliable mode is activated;
• and
• inactivating the reliable mode after completing the programming the OS image data into the first storage area;
• wherein while the reliable mode is activated, a migration of the OS image data from the first storage area to a second storage area is blocked,
• wherein the a number of data bit stored in each memory cell of the first storage area is smaller than a number of data bit stored in each memory cell of the second memory area.

A method of programming an operating system (OS) image of an nonvolatile storage device using a host device, the method comprising:

• checking, by the host device, whether the nonvolatile storage device supports a reliable mode for the programming of the OS image;
• if the nonvolatile storage device supports the reliable mode, interfacing a size information for the OS image between the nonvolatile storage device and the host device;
• activating the reliable mode by setting a register in the nonvolatile storage device;
• sending data for the OS image from the host to the nonvolatile storage device;
• programming the data for the OS image into a first storage area of the nonvolatile storage device while the reliable mode is being activated;
• and
• inactivating the reliable mode after completing the programming the data for the OS image into the first storage area,
• wherein while the reliable mode is being activated, the data for OS image is programmed into the first storage area having a first reliability, and migration of the data from the first storage area to a second storage area having a second reliability lower than the first reliability is blocked.