Only 8GB seen of my 12GB harddisk

[leofoe]

Yes, I know this has been discussed a lot. But the question is: where are those 4GB?
What I did on an A1200, KS3.0, WB3.1:
1. Made one partition and installed WB3.1
2. Installed a300.ld.strip and added "loadmodule a000.ld.strip" to first line of s:startup-sequence
3. Installed sfs with hdtoolbox
4. Formatted all partitions with sfsformat
It works great and Check4GB says everything is OK.
Used HDToolbox and HDInstTool, but it tells me my hd is only 8GB?

[Thomas]

Before you can create partitions, you have to change the drive type in HDToolbox. There is a button labelled "read configuration" which automatically fills in the fields of cylinders, heads and sectors. The values it entered for your HDD probably are 16383 cylinders, 16 heads and 63 sectors. This is the maximum for CHS type of addressing and it defines your HDD as being 7.8 GB.

You have to manually enter the real number of cylinders for a 12GB HDD. Theck the HDD's label or its manual if it says anything about the total number of blocks or the number of user sectors or the highest LBA (Logical Block Address). Divide this number by 16 (heads) and 63 (sectors). The result should be a whole number. This result is what you should enter as the number of cylinders.

I don't know of any program which can give you access to the remaining space once the drive type has been defined. You have to start all over again now, loosing all your partitions and already installed data.

It's not too difficult to write a program which hacks the real number of cylinders into the RDB, though.

Bye,
Thomas

[leofoe]

Thanks Thomas. I will try this out and publish the results here.

EDIT: It's an IBM Travelstar p/n 07N6635
Specifications
Drive Features: Capacity 12 GB
Interface: ATA-33
Rotational Speed: 4200 rpm
Access Time: 13 ms
Type of Drive: Internal
System Type: PC
Heads: 16
Cylinders: 16383
General Product Info: Also known as Compaq 171971-001, Compaq

According to your statement it's not a 12GB drive at all?

[Thomas]

According to your statement it's not a 12GB drive at all?[/quote

Of course it is. It says 12 GB on the label, doesn't it ?

Go to http://www.hitachigst.com -> Support -> Technical Library and search the manual for your HDD. With 07N6635 I couldn't find any 12 GB drive, but you probably know better what the model number of your HDD is.

The document you need is called "OEM Specification". It's a rather big PDF document. One of the first chapters is "Drive Characteristics" with a sub-chapter of "Logical Drive Parameter". It contains a list with geometry data and among it the LBA which we need.

I found a 12 GB drive called Travelstar 12GN with a model number of DARA-212000 and it has 23,579,136 sectors. So the right geometry for that drive is

Heads = 16
Sectors (Blocks per Track) = 63
Cylinders = 23392

Bye,
Thomas

[zipper]

07N6635
is an IBM drive (at least)...
well, Leofoe wrote so then after all.

[leofoe]

It's an IBM Travelstar DJSA-220 with p/n 07N6635. This drive is probably pulled from a Compaq Notebook and has Compaq partnumer 171971-001.
That's all I know and I cannot find a drive with these specs on the Hitachi site. :roll:

[quenthal]

DJSA-220 should be 20GB drive, not 12GB. Documents for this 20GB are available at Hitachi's site.

Maybe you could put this 07N6635 in to some PC, and check the parameters there?

[zipper]

General Product Info: Also known as Compaq 171971-001, Compaq

http://tech.yahoo.com/ps/compaq-171971-001/1990861389
seems to confirm it.

[leofoe]

quenthal wrote:
Maybe you could put this 07N6635 in to some PC, and check the parameters there?

That's a good idea. I can attach it via an IDE-USB adapter. Do I need special software to read these parameters?

[leofoe]

I was able to peel off the aluminum Compaq wrapper from the drive. Underneath it says:
(OEM:221655-001)
(16383CYL.16HEADS.63SEC/T)
Should I use these parameters in HDToolbox for this 12GB drive?

[Piru]

@leofoe

(16383CYL.16HEADS.63SEC/T)
Should I use these parameters in HDToolbox for this 12GB drive?

No

[leofoe]

Piru wrote:
No

Is this an answer to increase your number of posts more quickly? :-D

[leofoe]

OK guys, I started all over again and this it worked without entering anything about cylinders, blocks or whatever. Check4GB reports as expected.
Thanks a lot!