UDMA
Encyclopedia
For the main article about the controller, see Parallel ATA
The Ultra DMA (UDMA) interface was the fastest method used to transfer data between the computer (through the ATA controller
) and an ATA device until Serial ATA
.
UDMA took over from Single/Multiword DMA as the choice of interface between ATA devices and the computer.
The UDMA interface is grouped into different modes ranging from 0 to 6 each with its own specifications.
The Ultra DMA (UDMA) interface was the fastest method used to transfer data between the computer (through the ATA controller
Controller (computing)
In computing and especially in computer hardware, controller is a chip, an expansion card, or a stand-alone device that interfaces with a peripheral device...
) and an ATA device until Serial ATA
Serial ATA
Serial ATA is a computer bus interface for connecting host bus adapters to mass storage devices such as hard disk drives and optical drives...
.
UDMA took over from Single/Multiword DMA as the choice of interface between ATA devices and the computer.
The UDMA interface is grouped into different modes ranging from 0 to 6 each with its own specifications.
| Mode | Number | Also called | Maximum transfer rate (MB/s) |
Defining standard |
|---|---|---|---|---|
| Ultra DMA | 0 | 16.7 | ATA-4 | |
| 1 | 25.0 | ATA-4 | ||
| 2 | Ultra ATA/33 | 33.3 | ATA-4 | |
| 3 | 44.4 | ATA-5 | ||
| 4 | Ultra ATA/66 | 66.7 | ATA-5 | |
| 5 | Ultra ATA/100 | 100 | ATA-6 | |
| 6 | Ultra ATA/133 | 133 | ATA-7 | |
| 7 | Ultra ATA/ - | - | - |
See also
- PIOProgrammed input/outputProgrammed input/output is a method of transferring data between the CPU and a peripheral such as a network adapter or an ATA storage device....
- The first interface type used between devices (mainly hard disks) and the computer. - ATA
- Parallel ATA
- Serial ATASerial ATASerial ATA is a computer bus interface for connecting host bus adapters to mass storage devices such as hard disk drives and optical drives...