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diff --git a/doc/genisoimage/README.sparcboot b/doc/genisoimage/README.sparcboot new file mode 100644 index 0000000..b9bcbf2 --- /dev/null +++ b/doc/genisoimage/README.sparcboot @@ -0,0 +1,77 @@ +# @(#)README.sparcboot 1.1 99/12/12 joerg +# Edited for program name change by Eduard Bloch, 2006 + +The sparc boot feature does allow you to create your own Sun sparc boot disk. +This will allow you to create modified Solaris install disks or to create +installation CD's for other OS that run on sparc systems. + +A CD that is bootable on a Sun sparc system has a Sun disk label on sector 0 +and some Sun sparc disk partitions behind the ISO-9660 filesystem image. + +The layout of a sparc boot CD: + +---------------------------------------------------------------------------------------------------- +|Sun disk label| Iso 9660 filesystem |Generic sun4 boot|sun4c boot|sun4m boot|sun4d boot|sun4e boot| +---------------------------------------------------------------------------------------------------- + +On older system CD's all boot partition contain a full UFS miniroot filesystem. +On newer CD's the images on slice 2 and above only contain boot redirects to +slice 1. + +To create a CD that is bootable on Sun sparc systems you need to have the +boot images for the apropriate sparc architecture. + +A boot image file usually is a UFS filesystem image that contains the +primary boot image at byte offset 512 ... 8191. + +You may get such boot images by extracting partitions 1..5 from a Sun Solaris install CD, +but any bootable image should work. + +Here is an expample how to do this with the Solaris 7 install CD. + +dd if=/vol/dev/dsk/c0t6/sol_7_sparc_sun_srvr/s1 of=sun4 +dd if=/vol/dev/dsk/c0t6/sol_7_sparc_sun_srvr/s2 of=sun4c +dd if=/vol/dev/dsk/c0t6/sol_7_sparc_sun_srvr/s3 of=sun4m +dd if=/vol/dev/dsk/c0t6/sol_7_sparc_sun_srvr/s4 of=sun4d +dd if=/vol/dev/dsk/c0t6/sol_7_sparc_sun_srvr/s5 of=sun4e + + +genisoimage -R -sparc-boot sun4,sun4c,sun4m,sun4d,sun4e -o boot.img /mnt/install + +Will create the bootable image in boot.img. + +If you like to make the boot images smaller, you may call 'fstyp -v' +on the images and use the 'size' value to get the needed minimal +boot image size in kB. + +The result for the S7 boot CD is: + +ufs +magic 11954 format dynamic time Wed Oct 7 00:00:30 1998 +sblkno 8 cblkno 12 iblkno 16 dblkno 252 +sbsize 2048 cgsize 2048 cgoffset 20 cgmask 0xfffffff0 +ncg 7 size 25704 blocks 23987 + ^^^^^ + This is the number of interest. +bsize 8192 shift 13 mask 0xffffe000 +fsize 2048 shift 11 mask 0xfffff800 +frag 4 shift 2 fsbtodb 2 +minfree 10% maxbpg 2048 optim time +maxcontig 256 rotdelay 0ms rps 90 +csaddr 252 cssize 2048 shift 9 mask 0xfffffe00 +ntrak 14 nsect 72 spc 1008 ncyl 102 +cpg 16 bpg 1008 fpg 4032 ipg 3776 +nindir 2048 inopb 64 nspf 4 +nbfree 1768 ndir 667 nifree 24329 nffree 9 +cgrotor 2 fmod 0 ronly 0 + +So you should call: + +dd if=/vol/dev/dsk/c0t6/sol_7_sparc_sun_srvr/s1 of=sun4 bs=1k count=25704 + +To modify this filesystem, you can mount it using the fbk driver: + +chmod +t ./sun4 # Need to do this to avoid vm cache aliasing problems + +mount -F fbk -o rw,type=ufs /dev/fbk0:sun4 /mnt + |