1 # @(#)README.sparcboot 1.1 99/12/12 joerg
2 # Edited for program name change by Eduard Bloch, 2006
4 The sparc boot feature does allow you to create your own Sun sparc boot disk.
5 This will allow you to create modified Solaris install disks or to create
6 installation CD's for other OS that run on sparc systems.
8 A CD that is bootable on a Sun sparc system has a Sun disk label on sector 0
9 and some Sun sparc disk partitions behind the ISO-9660 filesystem image.
11 The layout of a sparc boot CD:
13 ----------------------------------------------------------------------------------------------------
14 |Sun disk label| Iso 9660 filesystem |Generic sun4 boot|sun4c boot|sun4m boot|sun4d boot|sun4e boot|
15 ----------------------------------------------------------------------------------------------------
17 On older system CD's all boot partition contain a full UFS miniroot filesystem.
18 On newer CD's the images on slice 2 and above only contain boot redirects to
21 To create a CD that is bootable on Sun sparc systems you need to have the
22 boot images for the apropriate sparc architecture.
24 A boot image file usually is a UFS filesystem image that contains the
25 primary boot image at byte offset 512 ... 8191.
27 You may get such boot images by extracting partitions 1..5 from a Sun Solaris install CD,
28 but any bootable image should work.
30 Here is an expample how to do this with the Solaris 7 install CD.
32 dd if=/vol/dev/dsk/c0t6/sol_7_sparc_sun_srvr/s1 of=sun4
33 dd if=/vol/dev/dsk/c0t6/sol_7_sparc_sun_srvr/s2 of=sun4c
34 dd if=/vol/dev/dsk/c0t6/sol_7_sparc_sun_srvr/s3 of=sun4m
35 dd if=/vol/dev/dsk/c0t6/sol_7_sparc_sun_srvr/s4 of=sun4d
36 dd if=/vol/dev/dsk/c0t6/sol_7_sparc_sun_srvr/s5 of=sun4e
39 genisoimage -R -sparc-boot sun4,sun4c,sun4m,sun4d,sun4e -o boot.img /mnt/install
41 Will create the bootable image in boot.img.
43 If you like to make the boot images smaller, you may call 'fstyp -v'
44 on the images and use the 'size' value to get the needed minimal
45 boot image size in kB.
47 The result for the S7 boot CD is:
50 magic 11954 format dynamic time Wed Oct 7 00:00:30 1998
51 sblkno 8 cblkno 12 iblkno 16 dblkno 252
52 sbsize 2048 cgsize 2048 cgoffset 20 cgmask 0xfffffff0
53 ncg 7 size 25704 blocks 23987
55 This is the number of interest.
56 bsize 8192 shift 13 mask 0xffffe000
57 fsize 2048 shift 11 mask 0xfffff800
58 frag 4 shift 2 fsbtodb 2
59 minfree 10% maxbpg 2048 optim time
60 maxcontig 256 rotdelay 0ms rps 90
61 csaddr 252 cssize 2048 shift 9 mask 0xfffffe00
62 ntrak 14 nsect 72 spc 1008 ncyl 102
63 cpg 16 bpg 1008 fpg 4032 ipg 3776
64 nindir 2048 inopb 64 nspf 4
65 nbfree 1768 ndir 667 nifree 24329 nffree 9
66 cgrotor 2 fmod 0 ronly 0
70 dd if=/vol/dev/dsk/c0t6/sol_7_sparc_sun_srvr/s1 of=sun4 bs=1k count=25704
72 To modify this filesystem, you can mount it using the fbk driver:
74 chmod +t ./sun4 # Need to do this to avoid vm cache aliasing problems
76 mount -F fbk -o rw,type=ufs /dev/fbk0:sun4 /mnt