CompTIA®A+ Exam Notes : Troubleshoot Hard Drives And Raid Arrays With Appropriate Tools

4. Hardware and Network Troubleshooting

4.3 Troubleshoot hard drives and RAID arrays with appropriate tools.

1. If the CMOS setup is not properly setup the computer may ignore or not look at the CD-ROM as a bootable option. Verify in the CMOS that your settings are properly set to boot from the CD-ROM drive.

2. The Complementary Metal-Oxide Semiconductor (CMOS) allows the computer to store the Real Time Clock (RTC)and other device information even after the computer is switched off and on. This is achieved by using a battery just for CMOS.

3. Generally, these settings will be under the boot options. Setup your boot options similar to the below example.

  • Floppy / LS120
  • CD-ROM
  • Network (if available)
  • Hard Disk Drive

4. If CD-ROM is listed after a device that is bootable it will boot from the other device before the CDROM. Verify that the devices before CD-ROM, such as floppy, do not have bootable media in them.

5. If the SCSI bus termination is not done, SCSI devices on the bus will not function properly. This is due to reflection of the signals at the end of the bus. To prevent this, both ends of the SCSI bus needs to be terminated. If one end of the SCSI bus is terminated, you may find intermittent problems. Never terminate the bus at a device connected in between.

6. If you are creating a Striped volume on a new Windows 2000 machine, it can only be created on dynamic disks. However, if you are upgrading a Windows NT computer to Windows 2000, any existing stripe set will be supported.

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