prep revision 1.6 
1	$NetBSD: prep,v 1.6 1998/01/09 18:47:26 perry Exp $	
2
3Before you start you might need to consider your disk configuration
4to sort out a quirk in SCSI-ID to SD-UNIT mapping that exists on
5Sun Sparcstations.
6
7Upon leaving the factory, SunOS and the OpenBOOT ROM map according to
8this table:
9
10    SCSI-ID ->	SunOS SD-UNIT
11    0		sd3
12    1		sd1
13    2		sd2
14    3		sd0
15    4		sd4
16    5		sd5
17    6		sd6
18
19Unlike SunOS and the OpenBOOT ROM, a generic NetBSD kernel numbers
20scsi drives sequentially as it finds them.  The drive with the
21lowest scsi-id will be called sd0, the next one sd1, etc.
22
23To ease the installation process, the default NetBSD kernel in the
24distribution is setup to match the Sun mapping above by hard-wiring
25scsi-id#3 to sd0 and scsi-id#0 to sd3. The remaining drives will be
26dynamically mapped to other sd* numbers.
27
28A truely generic NetBSD kernel is also provided as `/netbsd.GENERIC',
29which will do the standard NetBSD probe ordering. If your configuration
30differs from the default Sun setup, you can try to use this kernel to
31complete the installation.
32
33NOTE: this is also a concern when you start building your own customised
34kernels.
35
36
37Your OpenBOOT ROM may need some setup.  make sure you boot from `new
38command mode'.  If your machine comes up and gives you a `>' prompt
39instead of `ok', type:
40
41    >n
42    ok setenv sunmon-compat? false
43    ok
44
45This is needed because the NetBSD kernel relies on functionality provided
46by OpenBOOT ROMs -- the ability to pass down Forth commands and have them
47executed in the ROM -- that appears to go away when the OpenBOOT ROM
48operates in `old monitor compatibility' mode.
49
50Also, you cannot use the security modes of the sparc OpenBOOT ROM.
51
52    ok setenv security-mode none
53
54
55
56If you're installing NetBSD/sparc for the first time it's a good idea
57to look at the partition sizes of disk you intend installing NetBSD on.
58
59Asumming a classic partition scheme with root (`/') and /usr filesystems,
60a comfortable size for the NetBSD root filesystem partition is about 20MB;
61a good initial size for the swap partition is twice the amount of physical
62memory in your machine (though, unlike SunOS 4.x, there are no restrictions
63on the size of the swap partition that would render part of your memory
64unusable). A full binary installation takes about 60MB in `/usr'.
65
66Some network devices (i.e. the built-in `le' interface on sun4m machines)
67allow a choice between operating on a UTP or a AUI port. The `le' driver
68supports automatic detection of the port which is actually connected to
69the wire.
70
71If automatic detection is not available or not working properly in your
72environment, you may have to specify the type connection using the
73`media' parameter of ifconfig(8). During installation, you'll get the
74opportunity to specify the appropriate medium. Use ``10base5/AUI''
75to select the AUI connector, or ``10baseT/UTP'' to select the UTP connector.
76
77