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partitions do not end on cylinder boundaries

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Vieux 29/03/2007, 18h30   #1
Rick Dooling
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Par défaut partitions do not end on cylinder boundaries

Hello,

I had Windows XP on a ThinkPad T40. I used partition
magic 8 to create a 20 gig empty partition at the end
of logical drive E before installing Debian Etch.

Installation went fine. I can boot to both Windows XP
and Debian. Everything appears to work fine, but I get
horrible warnings if I try to start partition magic.

And when I run fdisk -l inside Debian Etch,
I get this:

Disk /dev/hda: 80.0 GB, 80026361856 bytes
16 heads, 63 sectors/track, 155061 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes

Device Boot Start End Blocks Id
System
/dev/hda1 * 1 71835 36204808+ 7
HPFS/NTFS
Partition 1 does not end on cylinder boundary.
/dev/hda2 71836 110384 19428224 f
W95 Ext'd (LBA)
Partition 2 does not end on cylinder boundary.
/dev/hda3 110384 155056 22515097+ 83
Linux
Partition 3 does not end on cylinder boundary.
/dev/hda5 71836 92160 10243768+ 7
HPFS/NTFS
/dev/hda6 92161 108360 8164768+ 7
HPFS/NTFS
/dev/hda7 108376 110384 1012063+ 82
Linux swap / Solaris

I don't care about running partition magic or dos
fdisk. I don't feel like repartitioning. Is it somehow
unstable if I just continue using mainly Etch and boot
occasionally into Windows for the odd program?

On other threads I've seen people say that Linux
doesn't care about the cylinder boundaries. True, or
will I eventually have problems even if I don't
repartition?

Thank you.

rd






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Vieux 29/03/2007, 20h50   #2
Joe Hart
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Par défaut Re: partitions do not end on cylinder boundaries

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Rick Dooling wrote:
> Hello,
>
> I had Windows XP on a ThinkPad T40. I used partition
> magic 8 to create a 20 gig empty partition at the end
> of logical drive E before installing Debian Etch.
>
> Installation went fine. I can boot to both Windows XP
> and Debian. Everything appears to work fine, but I get
> horrible warnings if I try to start partition magic.
>
> And when I run fdisk -l inside Debian Etch,
> I get this:
>
> Disk /dev/hda: 80.0 GB, 80026361856 bytes
> 16 heads, 63 sectors/track, 155061 cylinders
> Units = cylinders of 1008 * 512 = 516096 bytes
>
> Device Boot Start End Blocks Id
> System
> /dev/hda1 * 1 71835 36204808+ 7
> HPFS/NTFS
> Partition 1 does not end on cylinder boundary.
> /dev/hda2 71836 110384 19428224 f
> W95 Ext'd (LBA)
> Partition 2 does not end on cylinder boundary.
> /dev/hda3 110384 155056 22515097+ 83
> Linux
> Partition 3 does not end on cylinder boundary.
> /dev/hda5 71836 92160 10243768+ 7
> HPFS/NTFS
> /dev/hda6 92161 108360 8164768+ 7
> HPFS/NTFS
> /dev/hda7 108376 110384 1012063+ 82
> Linux swap / Solaris
>
> I don't care about running partition magic or dos
> fdisk. I don't feel like repartitioning. Is it somehow
> unstable if I just continue using mainly Etch and boot
> occasionally into Windows for the odd program?
>
> On other threads I've seen people say that Linux
> doesn't care about the cylinder boundaries. True, or
> will I eventually have problems even if I don't
> repartition?


AFAIK, everything will work fine.

Quote from http://www.win.tue.nl/~aeb/partition...n_types-2.html

>The Head value of CHS begin is not 0 or 1. PartitionMagic expects all
>FAT, HPFS and NTFS partitions to start and end on cylinder boundaries.
>(Comment: Windows NT on Alpha does not comply with this rule, and can
>create partitions starting on arbitrary sectors. There is no known
>operating system that requires this restriction. However, there exists
>software that tries to guess the disk geometry by looking at the CHS
>start and end values in a partition table. Note that with large disks
>CHS values are entirely meaningless.)


Still, I would recommend that you request your money back and use a
decent free program like gparted to do the partitioning. Explain that
the product is defective because it creates invalid partitions, and show
them the error you see.

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