Difference between revisions of "Drive Controller Types for the PC"
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| − | + | The first IBM XT computers used MFM hard drives. MFM allows a transfer rate up to 5MB/s and were only available in sizes from 5MB to 100MB. The data cable was 20 pin and another 34 pin cable. These drives fit into a 5.25” bay. It was not uncommon to have as many as 10 or more bad sectors with the drive still fully functional despite the areas that were marked. The drives had to be parked before the PC was transported to prevent damage from the drive heads impacting the disks. | |
== NRZ == | == NRZ == | ||
Revision as of 10:45, 9 July 2007
MFM
- Modified Frequency Modulation
The first IBM XT computers used MFM hard drives. MFM allows a transfer rate up to 5MB/s and were only available in sizes from 5MB to 100MB. The data cable was 20 pin and another 34 pin cable. These drives fit into a 5.25” bay. It was not uncommon to have as many as 10 or more bad sectors with the drive still fully functional despite the areas that were marked. The drives had to be parked before the PC was transported to prevent damage from the drive heads impacting the disks.
NRZ
RLL
- Run Length Limited
SCSI
- Small Computer System Interface
IDE
- Integrated Drive Electronics
EIDE
- Enhanced Integrated Drive Electronics
ESDI
- Enhanced Small Device Interface
