Re: help: wanabuild 7048-133 (PReP) boot floppies?
Hi,
help: wanabuild 7048-133 (PReP) boot floppies?
@ Fri, 07 Jun 2002 19:32:06 +0200
Gerhard Kroder wrote :
> Gerhard Kroder wrote:
> >
> > Hi,
> >
> > finally i'm trying to get woody on my 43P-133, using current boot disk
> > set
> [...]
> > But during boot
> > up from boot.bin floppy the system hangs in scsi timeouts, just short
> > after "Now booting kernel".
> [...]
> > >SCSI host 0 abort (pid 0) timed out -resting
> > >SCI bus is beeing reset for host 0 channel 0
> > >ncr53c8xx_reset: pid 0 reset reset flags=2 serial_numbers=456 serial_number_at_timeout=456
>
>
>
> OK, since nobody could help (is this worth a bug report or where else to
> "complain", and if, is it release critical for ppc?), i'm thinking about
> building bootfoppies on my own. But there are some things i don't know,
> need some help. Esp. i'm not a developer, so lota things are not
> familiar to me, though i know to programm C on linux a little and use
> Debian for quite a while. Please be patient with me.
>
> Some basic questions on this:
>
> Neither Debian Install Manual for PPC nor IBM7248-HOWTO are very clear
> about what happens at booting (from floppy). Both tell to use provided
> disks. "carolina-image" IMHO just is a kernel to boot, which loads
> rootfs from next floppy. Actually, what is the real boot-from-floppy
> process, before loading kernel? Is a bootloader integrated, as with
> i386?
> (Why) is debian rescue floppy image not able to boot the systmen? What
> is boot.bin floppy image for or doing?
>
> Deb docs tell to use dd with bs=1024, IBM7248-HOWTO tells to use bs=36.
> Somewher i read about bs=512. Which is right/better, is this critical at
> all?
>
> Ok, now something on building. Afaik i need to setup a "cross compiling
> environment" to produce any of these boot-disks from my i386 woody. How
> do i do this? There is a kind of HOWTO for this around, isn't? Pleas
> give me a pointer. What files/sources do i need for building prep
> bootdisks?
>
> Any thing else to mention, things i'v forgotten?
>
> Last, but not least, i gave carolina_bootimage_2.2.18_with_fb a try,
> workes fine instead of boot.bin. Currently i try to continue install
> process with root.bin... I'll give a report on that on boot-disk
> mailinglist.
There are two of PRePs.
One is original firmware, another one is openfirmware based one.
43P-133 have the original firmware.
They need to boot from floppies, CDROMS, HDDs, Networks, and from tapes.
The boot image is the same as "zImage" on linux/arch/ppc/boot/ or
like there. Installer is maybe the same as "zImage.initrd".
I suppose Debian calls as:
boot.img = zImage (or zImage.initrd)
root.img = ramdisk.image.gz
Please follow me if this is the wrong information. (^_^;;
They need to dd the "zImage" on the type41h area when they boot from HDD.
That's all.
This is the typical type of partitioning on PReP(with
original-firmware):
hda or sda
1: type41h some MB (>2MB?)
2: Linux swap
3: Linux native /
4: Linux native /usr
or
1: type41h some MB (>2MB?)
2: Linux swap
3: Linux native /
4: Extended
5: Linux native /usr
6: Linux native /home
or something like that.
# I don't know how much the zImage needs disk area on type41h now.
Another openfirmware based PRePs needs to boot with yaboot.
Ex.)PowerStack2 (former called as "FirePower" or "JPower" in Japan)
Best regards.
----------------------
Kaz Aoshima = Editor of the PReP station
Solid Surface Lab. of Material development,
Faculty of engineering, Tohoku University, Japan
E-mail:aoshimak@mail.cc.tohoku.ac.jp
#I would appreciate if you could give me suggestions
for my impolite English expressions.
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