Not all true my friend. I installed redhat 6.1 and have two scsi disks.
/boot is raid 1 and / is raid 0. Everything works great but I recompiled
my kernel and now I am out of luck. How did Redhat do it? I am here
because I want the question answered?
That is my 2 cents,
Jake
On Thu, 20 Jan 2000, Steve Borho wrote:
> On Thu, Jan 20, 2000 at 12:11:54PM -0700, Eric Sisler wrote:
> > >If you're / is a software raid device, then you'll need to either compile
> > >in that raid level into the kernel, or make it modular and create an
> > >initrd.
> >
> > So what you're saying is that it works either way, just like SCSI card
> > drivers.
> >
> > Either build the raid personality into the kernel and you don't need an
> > initrd (assuming you don't need one for SCSI card drivers) -OR- Leave the
> > raid personality as a module and build an initrd image.
> >
> > My question then is: How come this doesn't create a chicken & the egg type
> > of problem, like leaving the SCSI card drivers modularized and not making
> > an initrd image (been there, done that!). How is lilo able to access /boot
> > if /boot is on a software RAID partition and there's no initrd image
> > because the raid driver is built-into the kernel? Or am I just being
> > dense, which is a possibility given the amount of sleep I've gotten lately...
>
> Good question. AFAIK, /boot (or wherever it is you stash your kernel and
> initrd files) cannot be a software raid device... it must be a place where
> your BIOS can read it.
>
> LILO just stores BIOS geometry numbers about where to find those things,
> then uses straight BIOS calls to read them from the disk.
>
> Most BIOS's can read SCSI disks (the EPROM on the SCSI card patches the
> BIOS, otherwise you could never boot Windows or anything else), but they
> know nothing about Linux's software RAID scheme.
>
> So you can get away with loading SCSI and/or RAID modules after the kernel
> has booted (with an initrd) for your / partition, but /boot must have a
> normal filesystem.
>
> --
> Steve Borho Voice: 314-615-6349
> Network Engineer
> Celox Communications Corp
>
> Fortune of the day:
> The so-called lessons of history are for the most part the rationalizations
> of the victors. History is written by the survivors.
> -- Max Lerner
>
>
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