What is ERD(Emergency Repair Disk)?

Thisis intended to provide just enough recovery to restore a system to a bootable state and is not a replacement for regular backups. During Windows NT 4.0 Setup, you are given the option to create an Emergency Repair Disk (ERD). Microsoft recommends that you create an ERD during Setup so that you will have the proper tools in case of any fault. You should update the repair information and create a new Emergency Repair Disk any time you change the system configuration. To update ERD:

• Type rdisk /s in the Open box.
• Type rdisk in the Open box, and then click Update Repair Info.