Solved: Hard Drive Sectors, Need to edit; Idiots guide needed!

Discussion in 'Hardware' started by piratetigger, Jun 10, 2009.

Not open for further replies.

Joined:
Mar 18, 2002
Messages:
67
Hello,

Let me start by saying that I know very little about editing hard drives, this may be simple, this may be not. I dont know, but hopefully somebody can point me in the right direction.

Background; I wish to upgrade the hard disk in my DVD recorder, in order to do this I need to edit some data on a hard disk, the text pasted below comes from somebody who has done this;

Before continue write down maximum number of sectors in HDD. Very often is written on top of disk drive. From this number subtract 8MB => 16384 sectors.
This number we will be call "NoS" (Number of Sectors) (for example my NoS=1953508784 [=1953525168-16384])

To 1st sector (sector No. 0), where is partition table,
to offset 1CA to 1CD write number NoS-4 (for me 1953508780) converted to HEX (for me 74702DAC) but write it backwards!!! (for me AC, 2D, 70, 74).

To 5th (sector No. 4)
to offset 024 to 027 write number NoS/4 (488377196) converted to HEX (1D1C0B6C) and write normaly (1D, 1C, 0B, 6C).

to offset 02C to 02F write number NoS/4 (1D1C0B6C HEX) subscracted by number written in offset 028-02B (00004000 HEX) and subscracted by number 0100 in HEX. (for my numbers: 1D1C0B6C-4000-100 = 1D1BCA6C) and write normaly (1D, 1B, CA, 6C)

to offset 04C to 04F write number NoS/4 (1D1C0B6C HEX) also subscracted by number written in offset 048-04B (00095100 HEX) and subscracted by number 0100 in HEX. (for my numbers: 1D1C0B6C-95100-100 = 1D12B96C) and write normaly (1D, 12, B9, 6C)

To 335,981th sector (sector No. 335980)
to offset 00C write number NoS/4 (1D1C0B6C HEX) also subscracted by number written in offset 008-00B (000D1300 HEX) and subscracted by number 0100 in HEX. (for my numbers: 1D1C0B6C-D1300-100 = 1D0EF76C) and write normaly (1D, 0E, F7, 6C)

I am lucky in that the hard drive I have has the same number of sectors. So what to enter has already been worked out for me, the issue I am having is how to enter the data.

I have connected the drive to windows, and can see it in device manager. What I need is a program that will allow me to enter the information above, and a guide on how to enter it.

Any takers? or have I lost everybody?

Kind Regards,

James

2. Elvandil

Joined:
Aug 1, 2003
Messages:
51,988

Joined:
Mar 18, 2002
Messages:
67
Is there any tool that will allow me to do this editing in windows, as the hard disk is not being used for pc purposes? I have no floppy drive, so creating a bootable floopy is an issue!

Joined:
Mar 18, 2002
Messages:
67
Right I am making progress, I can now edit the drive. My next question, what do I write.

To 1st sector (sector No. 0), where is partition table,
to offset 1CA to 1CD write number NoS-4 (for me 1953508780) converted to HEX (for me 74702DAC) but write it backwards!!! (for me AC, 2D, 70, 74).

I gather that I input AC, 2D, 70, 74 in sector 0, but where in sector 0? There are rows labeled 0000-01F0 with 16 (16x2) colums. Is the 1ca 1cd a grid referance? I have attached a picture blow to shopw you what I see.

Thanks,

James

Joined:
Mar 18, 2002
Messages:
67

As Seen On

Welcome to Tech Support Guy!

Are you looking for the solution to your computer problem? Join our site today to ask your question. This site is completely free -- paid for by advertisers and donations.

If you're not already familiar with forums, watch our Welcome Guide to get started.

over 733,556 other people just like you!