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Unexpected assignment of Drive Letters???

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Gouverneur

Programmer
Sep 7, 2001
12
US
I have Windows 98SE running on ASUS A7V133 Motherboard with 1000MHz Athlon CPU.

I recently replaced three 20GB hard disks with three 40GB Disks. I intend to use the three 20GB disks to replace smaller disks on my second system (used by my girlfriend).

When I used my primary system to prepare the 20GB disks, I got unexpected drive letter assignments. I temporarily replaced my third disk with each of the three 20GB disks, to delete existing partitions and create new ones.

For my main system, the assignments are as follows for my 40GB disks.

1st disk: C (Primary), F, G , H, I
2nd disk: D (Primary), J, K, L
3rd disk: E (Primary), M, N, O

The above is just what I would expect.

When I replaced, my third disk with 20GB disks and created one Primary and one logical drive, I got the following assignments for one of the disks (as expected).

1st disk: C (Primary), F, G , H, I
2nd disk: D (Primary), J, K, L
3rd disk: E (Primary), M

For the other two disks, I got the following unexpected assignments..

1st disk: C (Primary), E, F, G , H
2nd disk: D (Primary), I, J, K
3rd disk: L (Primary) & M

Fdisk from a DOS Prompt and Windows Explorer agreed with the above, while Partition Magic showed the expected assignments for all three disks.

Since the three 20GB disks are the same type and size from Western Digital, I do not think that some subtle difference in the disks is responsible, but I suppose it is possible. It seems more likely that the cause is some subtle difference in the sequence of events during installation of the disks and the use of the Fdisk & Format utilities. I do not remember any difference in the sequence of operations, but I cannot claim to remember the exact sequence I performed.

I just cannot imagine what caused the strange assignments, especially since PowerQuest Partition Magic displayed the expected assignments for all three disks.

Does anybody have any thoughts on the above? Has anybody encountered strange drive letter assignments?

I would like to know what caused the assignments before I try to replace the smaller disks on my second system. A lot of the software on that system will have problems if similar drive letter assignment problems occur on that system. I intend to use PowerQuest utilities Drive Image and Partition Magic to do the disk upgrades, without reinstalling the OS or applications software. Dinosaur from prehistoric mainframe era
Eschew obfuscation!
If one hundred million people believe a foolish idea, it is still a foolish idea!
 
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