RDISK is gone in Windows 2000
There is no RDISK.EXE in W2K.
To create a recovery disk:
Start - Run NTBACKUP.EXE
Tools > "Create an Emergency Repair Disk"
Insert a blank formatted disk in drive A: and click OK
Click OK again.
User accounts are now stored in AD and will not be recoverable from the recovery disk.
Active directory must be backed up and restored separately.