Subject: Re: Amiga NetBSD different from other NetBSD?
To: Peter Seebach <firstname.lastname@example.org>
From: Luke Mewburn <email@example.com>
Date: 12/23/1994 10:17:59
> Oh, *that* would explain it. So, on the PC ports, sdxa is always the first
> partition, root or otherwise? Cool! Someone make the Amiga port that way. :)
Actually, on the i386 port, I consider a is the root partition, not
necessary the first partition. On my disk, sd0f is the first physical
partition. (Both Solaris and Ultrix can't cope with this.) sd0a is
physically after sd0f,e, and b.
For example, in experiments to move the `locality of reference' of head
movements on my disks, I have sd0 physically layed out as:
dev size mountpoint
--- ---- ----------
sd0f 120 /usr
sd0e 48 /var
sd0a 16 /
sd0b 48 swap
(sd0b 16 mfs:/tmp)
sd0g 720 /slab/0
sd0h 48 /altroot
If I have at least two drives, altroot is 23MB on sd1b at the start
and have a second swap partition of 48MB, and the rest becomes /slab/1
Now, the theory is, especially for sd0, that head movement usually
hangs around / and swap and then /var, in close proximity.
Luke Mewburn UNIX Technical Support
<firstname.lastname@example.org> CPR Project, ITG
Phone: +61 3 634 2112 Telecom Australia.