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PATA is also called Parallel ATA which is designed by Western Digital in the mid 1980s. It appears earlier than SATA which is also called Serial ATA. PATA drive technology has played very important role in mainstream computing until it has been replacing by SATA. Why is it surpassed? In the blow several paragraphs, I will tell the difference between PATA and SATA. From the differences, you will see many advantages that SATA has, while PATA doesn’t have.
People believed that parallel devices transferred data faster than SATA for a lone time. However, it is not true. Actually, SATA is much faster than PATA. From the cables of them, you can see the reason. PATA drivers use a flat gray cable for connectivity to the motherboard and Molex power connector, while SATA drives use round serial cable as a data cable and flat SATA specific power connector.
The most obvious difference of them is the data transfer rates. Owing to the newer data technology, SATA hard drives are capable of transferring up to 300 MB/s, whereas the data transfer rate of PATA at most reaches 133 MB/s speed.
Third, SATA consumes the power is just a fraction of what the PATA devices needs. PATA needs 5 V for operation while SATA just requires 250 mV. From this, we can see that SATA saves much power than PATA.
Nowadays, computers require “hot swapping” facility to satisfy their needs. PATA doesn’t have this facility, while SATA can offer this facility. So SATA has become popular than PATA.
Another difference between SATA and PATA is the software incompatibility problem. PATA has some problems in the compatible of some particular operating systems. However, SATA generally doesn’t have this problem. It can support many operating systems.
From these above resources, we can see that SATA have many advantages than PATA. Therefore, the PATA drives technology will be replaced by SATA. Maybe some day SATA will also be replaced by other advanced technology.