27 Feb
2002
27 Feb
'02
12:38 a.m.
Johnny Billquist wrote:
>:-) I have a bunch of UDA50, both for my PDP-11s, and for the 8650.
Johnny, were you suggesting you have a *spare* one among them?
>However, the Ultrix driver is a beautiful beast.
When you declare an MSCP
>disk, you don't say where it's located. You just say:
>disk ra<x> at mscp drive <y>
>
>Controllers are declared as:
>controller uda0 at uba0
>controller uq0 at uda0
>controller hsc0 at ci0
>
>And then the disks can be either at hsc0 or uq0, and you can move them
>without problems.
>DSSI is yet another, and so on...
>
Jochen Kunz wrote:
This is also true for NetBSD. From my knowledge the
shebang should
be build like this:
mainbus0 at root
ibus0 at mainbus0
shac0 at ibus0
sii0 at ibus0
dssibus* at shac?
dssibus* at sii?
scs* at dssibus?
mscpbus* at scs?
If I'm not mistaken the whole idea stems from BSD anyway (just as
the whole Ultrix does.) In 386/BSD and early FreeBSD the config(8)
syntax distinguished controller from device. Here this is from
GENERIC.allvax of 4.3 BSD:
controller mba0 at nexus ?
controller mba1 at nexus ?
...
disk hp0 at mba? drive 0
disk hp1 at mba? drive ?
...
master ht0 at mba? drive ?
tape tu0 at ht0 slave 0
tape tu1 at ht0 slave 1
master mt0 at mba? drive ?
tape mu0 at mt0 slave 0
tape mu1 at mt0 slave 1
controller uba0 at nexus ?
controller uba1 at nexus ?
...
controller uda0 at uba? csr 0172150 vector udaintr
disk ra0 at uda0 drive 0
disk ra1 at uda0 drive 1
...
controller bi0 at nexus ?
controller kdb0 at bi0 csr 0 vector kdbintr
disk kra0 at kdb0 drive 0
disk kra1 at kdb0 drive 1
disk kra2 at kdb0 drive 2
disk kra3 at kdb0 drive 3
So, just want the record to be straight, the beautiful design most
probably comes from Berkeley. I do admit though that they don't
seem to have a separate mscp controller, which I though Ultrix had,
but again, I should be looking before talking ...
cheers,
-Gunther
--
Gunther Schadow, M.D., Ph.D. gschadow(a)regenstrief.org
Medical Information Scientist Regenstrief Institute for Health Care
Adjunct Assistant Professor Indiana University School of Medicine
tel:1(317)630-7960 http://aurora.regenstrief.org