This one sounds great! I will try this one first, and will get the feedback here, thanks a lot!
Regards,
Bin
To: xubin0712@hotmail.com CC: u-boot-users@lists.sourceforge.net From: wd@denx.de Subject: Re: [U-Boot-Users] is it possible to make the booting sequence in U-boot? Date: Fri, 5 Oct 2007 00:32:38 +0200
In message 13049956.post@talk.nabble.com you wrote:
I am trying to make two different booting methods with some booting sequence in u-boot, like the bios in PC does. Basically I have kernel Image 1 in NAND and File system 1 on hard drive, kernel image 2 and File system 2 also on the same NAND Flash. The goal here is try to boot the system from Image 1 and file system 1 first, and if the hard drive fails, the bootloader (u-boot) will try to boot from Image 2 and File system 2 *automatically*. My question is, is it possible to achieve this in uboot? If so, any hints?
This is possible, and actually trivial.
Define two environment variables, say "boot_disk" and "boot_nand" to boot from disk or NAND, respectively, such that "run boot_disk" will perform a disk boot the way you want it, and "run boot_nand" will boot form NAND.
Then define "bootcmd" as "run boot_disk;run "boot_nand".
That's all.
See also the manual for additional bells and whistles like watchdog support, boot counter etc.
Best regards,
Wolfgang Denk
-- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de "Life and death are seldom logical." "But attaining a desired goal always is." -- McCoy and Spock, "The Galileo Seven", stardate 2821.7
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