[LinuxBIOS] What to implement "system recovery" features in bios
a1426z at gawab.com
Fri Jan 19 19:28:12 CET 2007
li pan wrote:
> Hi, guys
> I want to implement system recovery features in bios.
> The basic idea is:
> When booting, the user hit some key to enter our program, or else go
> for the normal boot process.
> The user can use the bios to back up his os. If the os fails and can't
> boot, he can fix his
> os using the backup. And he will be able to use bios to browse his hard
> disk. Basically like some features found on some HP,IBM's pcs.
> I have done windows and linux system programming but have never touch
> BIOS, I think maybe linuxbios can help me. Here is my questions:
> 1 Can linuxbios do this stuff? I think most likely it is yes:-)
> 2 This will be installed on some pcs which run linux, windows or other
> os. So maybe we need the award/ami bios coexist with linuxbios on the
> same pc. ( We will assemble these pcs, we can choose which type of
> mainboard to use, so there will be only one type of "old" bios)
> Is this possible?
> I mean we want to let award bios to serve normal os,
> and linuxbios to do the system recovery stuff. Maybe change some part
> of award bios to let it boot linuxbios once user hit the key.
You basically need a DualBIOS system, that allows you to switch between a
main and backup bios.
> We don't mind if we can simply throw award bios away, but we want to
> make sure our pcs can run any "normal" os.
> 3 How much space will all these take? Can we fit them is one bios
> chip? I don't know how IBM do these, maybe they use another chip to
> store their system recovery program, this feature can be found on old
> ibm pcs, but in those days, bios chip was small.
It depends. I you want to go for the DualBIOS approach, then you need a
double size ROM. If you only need a recovery module (i.e. extension ROM)
without an additional BIOS, then all you need is FILO (~50kb) plus your
> 4 Most import, am I on the right track? I am not familiar with low
> level programming ( not this low), sorry if my idea sounds too crazy.
It's a great idea.
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