Trouble partitioning disk w/ > 4000 cyl.

Trouble partitioning disk w/ > 4000 cyl.

Post by Christian Recktenwal » Wed, 20 Aug 1997 04:00:00



Hi Folks,

I tried to install RedHat 4.2 w/ kernel 2.0.30
on a SCSI-disk (IBM on AHA2940UW).

Problem: I can't create correct partitions on that disk,
because afterwards the partition table looks like:

   Device Boot  Begin   Start     End  ...
/dev/sda1           1       1    1000  ...
/dev/sda2        1001    1001    2000  ...
/dev/sda3        1024    2001    2500  ...
(/dev/sda4   extended)
/dev/sda5        2048    2501    3500  ...
/dev/sda6        3072    2501    4000  ...

fdisk 'v' command complains about overlapping partitions.

Why is 'Begin' set to 1024 though I wanted "2001" ?
Why seems 'Begin' to be grid-locked to multiples of 1024?

I've tried changing "fdisk" on the bootdisk (got a new one from
util-linux-2.7.1).
The problem occured also on an IDE disk w/ > 4000 cyl.

I think this partitioning should work without using
the DOS translation mode from the adapter's BIOS.

TIA, Chris

(Suggestions as PM preferred.)

--
Christian Recktenwald               | elwood sys adm
FaVeVe Uni Stuttgart                |

-------------------------------------------------------------------------------
** In personal computers, the CPU is a highly
** integrated chip called the microprocessor.
**                                          elwood old mainboard users manual.

 
 
 

Trouble partitioning disk w/ > 4000 cyl.

Post by Bruce Lytl » Thu, 21 Aug 1997 04:00:00



> Hi Folks,

> I tried to install RedHat 4.2 w/ kernel 2.0.30
> on a SCSI-disk (IBM on AHA2940UW).

> Problem: I can't create correct partitions on that disk,
> because afterwards the partition table looks like:

>    Device Boot  Begin   Start     End  ...
> /dev/sda1           1       1    1000  ...
> /dev/sda2        1001    1001    2000  ...
> /dev/sda3        1024    2001    2500  ...
> (/dev/sda4   extended)
> /dev/sda5        2048    2501    3500  ...
> /dev/sda6        3072    2501    4000  ...

> fdisk 'v' command complains about overlapping partitions.

> Why is 'Begin' set to 1024 though I wanted "2001" ?
> Why seems 'Begin' to be grid-locked to multiples of 1024?

> I've tried changing "fdisk" on the bootdisk (got a new one from
> util-linux-2.7.1).
> The problem occured also on an IDE disk w/ > 4000 cyl.

> I think this partitioning should work without using
> the DOS translation mode from the adapter's BIOS.

> TIA, Chris

> (Suggestions as PM preferred.)

I don't have a solution to this, I just found this problem last night,
while compiling a new kernel.....
I tried everything I could think of, erasing the WHOLE partition tables,
starting all over again (writing down what it was before I started) and
rebuilt it one partition at a time, as soon as I got to the third
partition, the same problem reared it's ugly little head. So far today,
I've gotten 2 responses on it, none of any help. One pointed out, Hey,
your begin data is overlapping (NO SHIT SHERLOCK!), the other said that
the kernel paid no attention to this(don't worry, sorry but, it's not
right...).
Something I did last night complained about it, that was why I started
looking. I backed up all my data, before I started screwing around, ran
e2fsch on all partitions, with no errors.

See my post: STRANGE fdisk problem above for details.

The interesting thing is that after all the messing with the partition
tables, my data is intact, (I didn't format)

Stay tuned, Let me know if you get a response that explains this
behavior.

Regards

Bruce Lytle


 
 
 

1. Can I boot Linux on SCSI partition > 1024 cyl?

Well, I've got a 2GB SCSI drive that is already broken
up into two 1GB partitions, the first of which is already
full of OS/2 stuff that I'd rather not have to repartition.
If I start up with Boot Manager, can I then start LILO or
Linux of the second partition, even though it goes well
beyond the 1024 cyl. limit?

(BTW - I'm currently using the second partition as temporary
storage - it's formatted with HPFS).

Thanks,
OMF

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