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