Unable to convert hard drive to NTFS

I have a Windows XP laptop and I'm trying to convert my external hard drive from FAT32 to NTFS.
I'm using the command

convert e: /fs:ntfs

It asks me for the volume label and I enter My Book
Then it asks if I want to force a dismount, I say no. I choose to schedule the conversion on the next reboot.
When the system reboots I get a blue screen with the message:
"Cannot determine file system on drive E:"
The system starts up and the dirve has not been converted.
I ran a check disk and it completed ok, but I get the same problem.
Can anyone help with this?

Who is Participating?
RemConnect With a Mentor Commented:
best way is to accept the dismount, anyway the conversion will take place AFTER the reboot.
cah00tsAuthor Commented:
I checked to see if it was set to Optimize for Quick removal. It was not. I tried the command line again expecting the same dialogue where it asks to dismount, but after i entered the volume label it just started converting and completed successfully. Not sure why it worked this time.
Thanks for your help.
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