Martin Reindl wrote:
> "J.C. Roberts" <[EMAIL PROTECTED]> wrote:
> 
>> On Sat, 17 Dec 2005 18:03:21 +0100, Martin Reindl
>> <[EMAIL PROTECTED]> wrote: 
>> 
>>> "J.C. Roberts" <[EMAIL PROTECTED]> wrote:
>>> 
>>>> On Fri, 16 Dec 2005 13:50:48 -0800, "J.C. Roberts"
>>>> <[EMAIL PROTECTED]> wrote: 
>>>> 
>>>>> (2) When doing the installation disklabel, the "suggested"
>>>>> starting offset for the 'a' partition is 0? I know using an
>>>>> offset of 0 is discouraged on i386 and other systems (default is
>>>>> 63), so I figured I'd ask if using a 0 offset is the
>>>>> "best/correct" way for alpha? 
>>>> 
>>>> Just for those searching the misc@ archives...
>>>> 
>>>> I received info off-list that disklabel is doing the right thing by
>>>> using an offset of 0 on the alpha architecture.
>>> 
>>> I wonder anyway how you got the impression it was doing wrong and
>>> the offset would be 63 for the first slice. FAQ 14.1 only talks
>>> about i386 and amd64 under 'Disklabel tricks and tips/Leave first
>>> track free'. It's clear imo.
>> 
>> There's a difference between thinking disklabel is doing the wrong
>> thing and just making sure it's doing the right thing. ;-)
>> 
>> The alpha PSW is a weird beast with it's "Dual BIOS" where the first
>> AlphaBIOS/ARC is for running WinNT4 with x86 BIOS emulation support
>> and the second, the SRM Console, is for running Tru64 and OpenVMS.
>> 
>> The guys I've talked to at Digital/Compaq/HP told me the multitude of
>> alpha SRM's are very much closed source (due to the fact they control
>> VMS licensing/revenue) and obviously, each SRM is specifically built
>> for each machine model. On the weird machines like the PSW where
>> multi/dual-booting NT, VMS and OSF/1 can be done, there *might* be
>> some mad hackery in this particular SRM with a requirement for
>> keeping the first (logical) track free for the MBR.
>> 
>>> From what I've read, I think the way the linux guys have hacked a
>>> way 
>> into supporting the use of AlphaBIOS/ARC on the PSW is by having the
>> MBR and a small FAT partition for lilo and such. This same approach
>> is used on the PSW when running WinNT4 with NTFS.
>> 
>> In a situation where you are *only* running OpenBSD, using a offset
>> of 0 is probably just fine. On the other hand, if you happen to have
>> WinNT installed someplace (i.e. installed on another disk), the
>> supposedly "harmless" tag that NT writes on all disks might make a
>> real mess of your OBSD install. 
>> 
>> The problem is not so much that the OpenBSD docs are unclear,
>> instead, the problem is the setup of particular machine,
>> particularly in muti-boot configs, can be very convoluted. I only
>> asked because I'm just trying to *understand* what the heck I'm
>> doing and what all the possible ramifications are. -In other words,
>> curiosity. ;-) 
> 
> So they only problem now is documenting how to multiboot OpenBSD and
> WinNT on alpha? Pardon me, but i don't expect Nick to put up a section
> about this in the FAQ. Especially since it would involve explaining
> AlphaBIOS fiddling which has nothing to do with OpenBSD and is a major
> PITA anyway.
> 
> martin

Lighten up a bit man. There is nothing in J.C.'s post that implies he
expects "a section about this in the FAQ".

Maybe there ought to be a section in the FAQ about how even the most
tangential reference to it on misc is like kicking a chicken coop.

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