After installing a new ATA-100, 80GB hard drive, you boot up the system and watch as the Power On Self Test (POST) displays information about the system on your monitor.
You notice the 80GB hard drive is correctly identified as 80GB, but it is listed as using UDMA/33.
How should you interpret this?
1. ATA-100 is actually UDMA/33 and this is normal.
2. >>Your hard drive ribbon cable is not an 80-conductor cable.
3. Your hard drive cable is not 40-pin.
4. Your hard drive ribbon cable is not installed correctly.
Explanation : The ATAPI-5 (AT Attachment with Packet Interface-5) standard approved in 2000 built on the ATAPI-4 standard and requires an 80-conductor cable for UDMA modes faster than UDMA/33 to be enabled. The 40- or 80-conductor cables are automatically detected.
ATA-100 should be displayed as UDMA/100.
If the ribbon cable was not 40-pin or not installed correctly, the hard drive would not have been detected at all.
Objective: Personal Computer Components
