On 24-Jun-98 Hugh Lawson wrote:
>
>> SLP/Internet Section wrote:
>> >
>> > Hi,
>> >
>> > 1)When I do rdev /boot/vmlinuz, I get :
>> > Root device /dev/sdb1
>> >
>> > But my partition is dev/hda2...and anyway I do have have any Scsi drive.
>> > I really dont understand How come?
>>
>
> Here's my understanding (gurus, please critique if wrong!):
>
> rdev /boot/vmlinuz <ret> returns the present rdev setting. This can be
> wrong sometimes without causing any harm.
>
> But here is a case where it would definitely do harm.
> Let's say you wanted to make a boot floppy, like this:
>
> dd if=/boot/vmlinuz of=/dev/fd0 bs=8192 <ret>
>
> If the rdev value was wrong then this boot floppy wouldn't work. So,
> before making the boot floppy, do rdev /boot/vmlinuz /dev/hda2 <ret>,
> assuming /boot/vmlinuz and /dev/hda2 are the right values for you. This
> actually changes the rdev value.
>
> Hugh Lawson
> Greensboro, North Carolina
> [EMAIL PROTECTED]
You're mostly right. The rdev on kernels that lilo boots is generally
meaningless because lilo overrides it with whatever is in /etc/lilo.conf for
that boot option. Some boot floppies need the kernel to figure it out for
itself, and thus rdev is necessary.
--
Steve Borho <[EMAIL PROTECTED]>
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