upgrade revision 1.4 
1
2The preferred upgrade path is to set up a diskless-boot host, unpack
3and boot boot 1.3 diskimage as for a network installation, and to use
4the sysinst tool to upgrade your system.   Please see the `Installation'
5section for  further information.
6
7
8Upgrade via diskimage.
9----------------------
10
11If you cannot netboot, the recommended path is to upgrade by booting a
12diskimage from your swap partition.  Pmaxes cannot boot out out of
13anything but the 'a' partition. However, you *can* boot an upgrade
14kernel off your 'a' partition and tell that kernel  to use your
15'b' partition as its root.  The steps to do this
16(after you've  fetched the diskimage) with a current root of rzX are:
17
18	1) boot single-user from your current root, rzX.
19	    Be *sure* not to start swapping:
20
21		>> boot -f rz(0,X,0)netbsd -s 		# 3100
22		>> boot 5/rzX/netbsd -s 		# 5000/200
23		>> boot 3/rzX/netbsd -s 		# others
24
25	(NOTE: replace the X with the unit number of your disk:
26         boot 3/rz2/netbsd to boot drive 2 on a 5000/xxx.)
27
28	2) When you get a single-user prompt,  remount the
29	   root filesystem read-write. (You wil need to update the
30	   kernel soon.)
31
32		# mount /
33
34	   Then mount the filesystem with the diskimage, and
35	   uncompress and dd the diskimage into swap (b) partition.
36	   You will also need /usr mounted to run gunzip:
37
38		# mount /usr
39		# gunzip -c diskimage.gz | dd bs=10240 of=/dev/rrzXb
40
41	3) Mount swap (b) partition readonly on /mnt:
42		# mount -r -t ffs /dev/rzXb /mnt
43
44	4) Copy  the kernel from the B partition to your root:
45		cp -p  /mnt/netbsd /netbsd-1.3
46	   (this is important; you want the kernel in / and  swap
47	   to be a release kernel, or the release binaries will not work.)
48
49	5) halt:
50		# halt
51
52	6) Reboot with an argument of "n", telling the kernel to
53	   ask what device to use as  root:
54
55		>> boot -f rz(0,X,0)netbsd-1.3 n 	# 3100
56		>> boot 5/rzX/netbsd-1.3 n	 	# 5000/200
57		>> boot 3/rzX/netbsd-1.3 n 		# others
58
59	(NOTE: the n after the kernel name is a literal "n",
60	 not the disk unit number or partition. 
61	 It is an argument telling the kernel to ask for a root device.
62	 NOTE: replace the X with the unit number of your disk:
63         boot 3/rz2/netbsd to boot drive 2 on a 5000/xxx.)
64
65
66	7) The "n" argument tells the kernel to prompt you for
67	   the  root device, dump device, and root fileysystem type.
68	     Enter when the kernel asks for
69		Root device:
70
71	Tell it rzXb, where X is the same disk unit as in step 6.
72	Here's an example, again assuming drive  2 as in step 6:
73
74	KN03-AA V5.2b    (PC: 0x80051f1c, SP: 0xffffdeb0)
75	>> boot 3/rz2/netbsd n
76
77		boot device: rz2
78	root device (default rz2a): 
79	        <<< enter `rz2b' >>>
80	dump device (default rz2b): 
81	        <<< enter `none' >>>
82	file system (default generic): 
83	        <<< enter `ffs' >>>
84	root on rz2b
85
86
87then continue from the ``Once you've booted the diskimage'' step of
88the Installation instructions.
89
90
91
92
93