I have a Windows 2000 Server with 3x18G drives in a Raid 5. I am out of room and want to change these over to 3x73G drives. What is the easiest way to accomplish this.

I forgot to mention I am running an adaptec 2100S SCSI Raid controller card.

I did an image and then restored the image to the raid array , Acronis true image allowed me to restore an image to the raid array, Haven't tried the Ghost, A 15 day trial version is available to try from Acronis , Someone else may have another suggestion. Just trying to suggest something that worked for me,, I used a usb drive and put the image on it,, Ghost may also allow you to do It I don't know,, if 2003 or ghost 9 wil or not,,, MSI 845e mb 1 gb ram and a p4 2.4n running xp ,win 2000 advanced server and win 98 SE alot to learn and I know so little !!!!

Does anyone know if it is possible to swap drives one by one, let them re-build, and then expand the storage area once all 3 are swapped?

normally you backup, redo the array, then restore. You do backup don't you? if you swap drives and rebuild that way you end up with the exact same size raid array but now you have additional free space on the three drives. Not a good plan. Since the 2100s is a dual channel raid array you could add the 3 new larger drives, raid them, format them, assign a drive letter, then copy the smaller array to the larger. Take the smaller off and redo the drive letter associated with the larger to the former raid array and you are done. If you aren't backing up.... Golly gee wilerkers everyone. Learn to Internet Search

Actually the 2100S is a single channel controller and yes I do backup. But it was a great idea.

I was thinking the 2200s which is what I have. It will still work. You can have 7 devices on the ribbon cable. In your case you will only have 6 so you can do it with just the one channel. Otherwise do it the old fashioned way. 2 backups and then redo the array. Restore. Golly gee wilerkers everyone. Learn to Internet Search