>
>
> On 22.07.2017 19:35, Aruna Hewapathirane wrote:
> [...]
> >>> sudo losetup -o $((2048*512)) /dev/loop1 hd.img
> >>
> >> should'nt it be 63*512 ?
> >>
> >
> > nope should be 2048 and this is why -->
> > https://superuser.com/questions/352572/why-does-the-partition-start-on-sector-2048-instead-of-63
>
> it is for new hard disks,
Yes agreed it is for newer hard disks..
> here it conflicts with geometry used:
>
> >>>> fdisk -u -C100 -S63 -H16 hd.img
Actually no because if you look at the initial email hao sent carefully in step 2:
2. Create a primary partition.
fdisk -u -C100 -S63 -H16 hd.img
Notice even though hao *has* specified the geometry, fdisk does not show this ? Try it and see... if we go through the process and ask fidsk to print the partition information. This is what I see :
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Command (m for help): p
Disk hd.img: 49.2 MiB, 51609600 bytes, 100800 sectors ---> geometry is usually shown on the next line but zilch here ?
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x4c0d7fa4
Device Boot Start End Sectors Size Id Type
hd.img1 2048 100799 98752 48.2M 83 Linux
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
But if I do this: /sbin/fdisk -c=dos -u -C100 -S63 -H16 hd3.img
then fdisk complains saying DOS-compatible mode is deprecated, and after going through the process once again and we ask fdisk to print the partition we see:
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Command (m for help): p
Disk hd3.img: 49.2 MiB, 51609600 bytes, 100800 sectors
Geometry: 16 heads, 63 sectors/track, 100 cylinders <---- fdisk shows geometry this time around ah-ha !
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x030e7198
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
I put together a small video will make it easier for you to see all the above: https://youtu.be/kmG7CCy-F9Q
> and maybe conflicts with Bochs BIOS options or disk geometry options ?
Mmm.. I don't believe there are any conflicts. Please watch the video I sent earlier.
It has a fix and working solution : https://youtu.be/6oqTu8utMe4
>
> On 22.07.2017 19:35, Aruna Hewapathirane wrote:
> [...]
> >>> sudo losetup -o $((2048*512)) /dev/loop1 hd.img
> >>
> >> should'nt it be 63*512 ?
> >>
> >
> > nope should be 2048 and this is why -->
> > https://superuser.com/
>
> it is for new hard disks,
Yes agreed it is for newer hard disks..
> here it conflicts with geometry used:
>
> >>>> fdisk -u -C100 -S63 -H16 hd.img
Actually no because if you look at the initial email hao sent carefully in step 2:
2. Create a primary partition.
fdisk -u -C100 -S63 -H16 hd.img
Notice even though hao *has* specified the geometry, fdisk does not show this ? Try it and see... if we go through the process and ask fidsk to print the partition information. This is what I see :
------------------------------
Command (m for help): p
Disk hd.img: 49.2 MiB, 51609600 bytes, 100800 sectors ---> geometry is usually shown on the next line but zilch here ?
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x4c0d7fa4
Device Boot Start End Sectors Size Id Type
hd.img1 2048 100799 98752 48.2M 83 Linux
------------------------------
But if I do this: /sbin/fdisk -c=dos -u -C100 -S63 -H16 hd3.img
then fdisk complains saying DOS-compatible mode is deprecated, and after going through the process once again and we ask fdisk to print the partition we see:
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Command (m for help): p
Disk hd3.img: 49.2 MiB, 51609600 bytes, 100800 sectors
Geometry: 16 heads, 63 sectors/track, 100 cylinders <---- fdisk shows geometry this time around ah-ha !
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x030e7198
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
I put together a small video will make it easier for you to see all the above: https://youtu.be/kmG7CCy-F9Q
> and maybe conflicts with Bochs BIOS options or disk geometry options ?
Mmm.. I don't believe there are any conflicts. Please watch the video I sent earlier.
It has a fix and working solution : https://youtu.be/6oqTu8utMe4
:)
Thank's - Aruna
>
> --
> Best regards,
> Kamil Konieczny
> Samsung R&D Institute Poland
>
Thank's - Aruna
>
> --
> Best regards,
> Kamil Konieczny
> Samsung R&D Institute Poland
>
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