The mass storage devices were introduced in the sense just to provide storage support to the user data by storing them inside. These devices are numb and do not have any mechanism to control them. Later there came the ATA devices known as Advanced Technology Attachment or IDE (Integrated Drive Electronics) interfaces.
At first this interfaces is integrated along with the mass storage devices. As technology evolved, the interface technology evolved too. The physical types of IDE interfaces can be categorized based on the acceptance of the number of hard drives.
The types are IDE or ATA, ATA-2, ATA-3, ultra – ATA, ATA/66 and ATA 100. The distinctive that separate each of them are :
In IDE interface the mass storage devices and the device controllers are integrated in the device it self. This embedded technology saved an extra component usage. It supports up to 2 hard drives and transfer data in 16 bit formats. The PIO mode supported are zero, one and two.
- The ATA-2 supports faster PIO modes i.e. 3 and 4. It also supports DMA process. The communication between two peripheral hard ware devices is called Direct Memory Access (DMA). Additionally it supports logical block addressing and blocks transfer of data. Because of these advancements in ATA-2, it is also called Enhanced IDE or EIDE.
- The ATA -3 is released with just a minor enhancement in ATA - 2 the data transfer rate in block transfer of data is increased considerably.
- The ultra ATA is also called ATA 33 and DMA33, which supports multiword DMA mode and provides speed up to 33 mbps.
- The ATA/66 is introduced by Quantum Corporation and supported by Intel which increased the speed up to 66 mbps
- The ATA/100 tops the order by providing 100mbps speed of data transfer.
The programmed input/output is just a transferring method that specifies the data transfer rate. The PIO modes supported by ATA are given below.
- ATA support 0, 1, 2 where the speed ranges from 3.3 mbps, 5.2 mbps and 8.3 mbps.
- The ATA – 2 supports PIO 3 and 4 with the speed of 11.1 mbps and 16.6 mbps
Some digital facts:
- However, the IDE interfaces were the first in interface technology they had grown a lot with different nomenclatures such as SATA, PATA etc. The interfaces, which we are using now, are more advanced than the IDE types.
- The first IDE interface owes 40 pins technology for data transfer and a separate 8-pin holder for controller purpose.
- Now a days the interfaces and controllers were very much customized and sophisticated to save physical space.
- The life span of the interfaces using now is very less than the old IDE interfaces. This is because the newer interfaces were unable to provide a full-fledged functionality in power fluctuations.