Re: cdrom boot for sgi
Where /dev/sda holds the hacked iso image I get:
--------------------------------
debian-mips:~# fdisk /dev/sda
Command (m for help): p
Disk /dev/sda (SGI disk label): 0 heads, 32 sectors, 2854 cylinders
Units = cylinders of 1 * 512 bytes
----- partitions -----
Pt# Device Info Start End Sectors Id System
9: /dev/sda1 0 91327 91328 0 SGI volhdr
----- Bootinfo -----
Bootfile:
----- Directory Entries -----
0: linux sector23092 size 3792176
Command (m for help): q
--------------------------------
looing at the the line:
Disk /dev/sda (SGI disk label): 0 heads, 32 sectors, 2854 cylinders
^^^^^^^^
How the "0 heads," relates to the source code I don't know... sorry!
cf: with the out put for a SGI boot cdrom:
--------------------------------
parrot:~# fdisk /dev/cdrom
You will not be able to write the partition table.
Note: sector size is 2048 (not 512)
Command (m for help): p
Disk /dev/cdrom (SGI disk label): 1 heads, 32 sectors, 32048 cylinders
Units = cylinders of 32 * 512 bytes
----- partitions -----
Pt# Device Info Start End Sectors Id System
8: /dev/cdrom1 1922 32047 964024 5 SGI sysv
9: /dev/cdrom2 0 1921 61504 0 SGI volhdr
11: /dev/cdrom3 0 32047 1025536 6 SGI volume
----- Bootinfo -----
Bootfile:
----- Directory Entries -----
0: sgilabel sector 32 size 512
1: io4prom sector 33 size 697410
2: mr sector 1396 size25038336
3: sash.IP4 sector50299 size 212416
4: sash.IP5 sector50714 size 239840
5: sash.IP6 sector51183 size 203776
6: sash.IP7 sector51581 size 239840
7: sash.IP9 sector52050 size 239840
8: sashARCS sector52519 size 140612
9: sashIP12 sector52794 size 249280
10: sashIP17 sector53281 size 277104
Command (m for help): q
--------------------------------
Hope that explains what I meant
Alex Owen
On Tue, Apr 23, 2002 at 06:26:52PM +0200, Florian Lohoff wrote:
> On Tue, Apr 23, 2002 at 11:47:57AM +0100, R.A.Owen wrote:
> > The install system seems to start normally
> >
> > Also I have noticed that the fake volheader has "number of heads" set
> > to zero... can use fdisk to interogate this... A SGI boot CD has number
> > of heads set to one.
>
> Hmm - Where do you see a "Number of heads" ?
>
> struct device_parameters {
<SNIP>
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