Adding a slave 40GB drive NT4

Was the "original" d: drive on your first hard drive set up on an extended partition by chance?

First I want to explain why this happened.

By default (a hold over from DOS), when multiple hard drives with multiple partitions exist, the drives will be lettered as follows:
1st drive, primary partition = c:
2nd drive, primary partition = d:
1st drive, extended partition, 1st logical drive = e
1st drive, extended partition, 2nd logical drive = f
2nd drive, extended partition, 1st logicaldrive = g
2nd drive, extended partition, 2nd logical drive = h
and so on.

Now to address your issue: (you will need administrator privileges to do this) Go to Start Menu | Programs | Administrative Tools (Common) | Disk Administrator.
(I'm assuming the second partition on your first drive got reassigned to drive e:) Regardless of whether you have your view set to Vvolumes or Disk Configuration, right-click on your current e: drive, choose either "Assign drive letter" and give it another unused letter, or choose "Do not assign a drive letter" and click Okay. The change will take place immediately. Either choice will have the effect of making the letter "e" available. Now you can follow the same procedure to assign the letter "e"to the drive you wish. Make sure you go back and give the original drive e: the letter assignment you wish.

Although changing drive letter assignments really makes no physical changes to the drive, it's always a good idea to make sure you have agood backup of your important data before making ANY changes to your drive structure.

Good Luck.

(Repost)

Was the "original" d: drive on your first hard drive set up on an extended partition by chance?

First I want to explain why this happened.

By default (a hold over from DOS), when multiple hard drives with multiple partitions exist, the drives will be lettered as follows:
1st drive, primary partition = c:
2nd drive, primary partition = d:
1st drive, extended partition, 1st logical drive = e
1st drive, extended partition, 2nd logical drive = f
2nd drive, extended partition, 1st logical drive = g
2nd drive, extended partition, 2nd logical drive = h
and so on.

Now to address your issue: (you will need administrator privileges to do this) Go to Start Menu | Programs | Administrative Tools (Common) | Disk Administrator.
(I'm assuming the second partition on your first drive got reassigned to drive e:) Regardless of whether you have your view set to Vvolumes or Disk Configuration, right-click on your current e: drive, choose either "Assign drive letter" and give it another unused letter, or choose "Do not assign a drive letter" and click Okay. The change will take place immediately. Either choice will have the effect of making the letter "e" available. Now you can follow the same procedure to assign the letter "e" to the drive you wish. Make sure you go back and give the original drive e: the letter assignment you wish.

Although changing drive letter assignments really makes no physical changes to the drive, it's always a good idea to make sure you have a good backup of your important data before making ANY changes to your drive structure.

Good Luck.

Use Disk Manager to alter the drive letters assigned to your drives, you should be able to reletter any disk you choose into any letter you choose.

Hope this helps