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Re: Install on PowerMac 7500



On Tue, Jan 09, 2001 at 07:55:24AM -0800, David S. Bach wrote:
> I have several questions about installing on a PowerMac 7500. Before 
> I get deeply into something that won't work, I'd like to assess my 
> chances of getting a working, dual-boot Mac/Linux system.

don't now, but i have some response to the below stuff ...

> Questions:
> 1. How do I refer to a hard drive on the external bus? (there is an 
> internal bus and an external one). I take it that my internal boot 
> drive is /dev/sda1. What about SCSI ID 0 on the external bus? 
> /dev/sda10?

I suppose that you are speaking about when linux is already running, then you
can look at /proc/partitions to see which partitions are available.

That said, the scsi disk are devices /dev/sd##, where the first # denotes the
disk, starting from a, and independent on the bus, i think, and the second #
denotes the partition you are accesing, so /dev/sda1 is the first partition on
your first disk, and /dev/sda10 is the tenth partition on your first disk, if
you have only one disk on the internal bus, then /dev/sdb would be the first
disk on the external bus.

mmm, that said, your box has only one scsi chain, that has one internal
connector and one external connector, and one controller, most probably with
id 7. Then linux will simply number them following incrementing ids. Anyway,
this will appear during the boot message.

note 1 : you can access to a whole disk with /dev/sda for example, nice for
doing backups or such, or for using hdparm or partitioning disks.

note 2 : i think the bootx/OF/whatever naming scheme for disks is different.

> 2. The PM7500 has a MaxPower G3 300 processor card. Is it necessary 
> to tell BootX anything about this?

Don't think so, it should be transparent ...

> 3. The PM7500 has a PCI video card, iX3d Ultimate Res. Can this work 
> with Debian Linux? (The resolution is set at 1024 X 768 @ 75.9 Hz.)

There are two things here, the console system and X. The console needs a
working framebuffer device, i think with most macs, you can safely use the
offb, but there may be a specific fbdev for your hardware. Then there is X. In
most case, you can use the 3.3 XF68_FBDev server or if using XF4.0.2, you have
to specify the fbdev driver, and things will work, but maybe slowly. The X
acceleration is dependent of the actual graphic chip being used.

> 4. Is it safe to rush into installing BootX on the MacOS boot drive 
> and set up an external 1Gig drive  entirely for Linux?

Don't know, my guess would be that you can install bootx or whatever on a
small partition of the second disk, but then i never installed linux on a mac,
my ppc box being an apus amiga.

Friendly,

Sven Luther



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