Partition table error

[User <junkmail23@home.se>]

Since I had problems with the other disk images I tried the comb-disk from
http://rainbow.cs.unipi.gr/~harkal/ELKS/images/images-latest.zip

Here is the old partitions (not created by me)

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# fdisk /dev/bda
Command: p

	                 START		                 END
Decice	  Boot	Head	Sector	Cylinder	Head	Sector	Cylinder	Type	Sector count
/dev/bda1 ?     109	32      100		115	43	288		69	543912809			
/dev/bda2 ?	114     50      367		13	10	82		72	1629513059
/dev/bda3 ?	100     32	112		101	51	371		72	2036689696
/dev/bda4 ?	119     40	357		32	50	357		6e	-2147483638

Command:
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Why is there an minus mark before Sectort count on /dev/bda5?

Allright, I deleted the old partitions since I wanted to add new ones.

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Command: d

Delete partition:

Which partition to delete(1-4): 1
Deleting partition 1...Done
Command:

..and so on
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I doublechecked with p, there are no partitions left. Good.

I were trying to create one new partition instead

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Command: a

Add partition:

Which partition to add(1-4): 1
geo.cyl=79
First cylinder(0-79): 0
Ending cylinder(0-79): 79
Adding partition
Command: b // To set it bootable

Toogle bootable flag:

Which partition to toggle(1-4) 1
Command: t

Set partition type:

Which partition to toggle(1-4): 1
Set partition type: 81 // For Minix fs

Command: p

	                 START		                 END
Decice	  Boot	Head	Sector	Cylinder	Head	Sector	Cylinder	Type	Sector count
/dev/bda1 *     1       1       0               1       9       79               81     1431

Command: w // Write table to disk
BIOSHD: I/O error
dev 300, sector 0
ERROR! Only wrote -1 of 512 bytes to the parition table.
	Table possibly coruppted.
Command:
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First of all, probably the result is showing up just because my low fdisk-knowledge. The commands seems pretty
allright to me. I wonder where all the sectors, cylynder and such did go? Comparing to the first partition table.

The harddrive is according to Toshiba T1000LE (My computer is an T1000SE) User's manual an integrated 2 1/2" 20MB harddrive.

Thanks
Johan