On Mon, Feb 02, 2004 at 11:02:28PM +0800, Sam Song wrote:
1.Is ramdisk a must or not for embedded application?
No, you don't need a RAM-disk. U-Boot can directly boot from a flash partition (for example a cramfs or JFFS2 partition).
and some web pages,they say an initrd image is needed for loading your SCSI module at boot time.So if I didn't use SCSI module,I would save the initrd image.Is that so?
In embedded applications you normally _know_ which hardware you have, so either compile it directly into the kernel or load your module from a script while starting.
2.What advantage does ramdisk have?In which situation should we use it?
Initrds were invented for distributors; they normally don't know which hardware the user boots on, but have to supply drivers for every possible device.
Robert