UDMA, is short for Ultra-DMA (Direct Memory Access) and also known as Ultra ATA, UDMA is a standard developed by Quantum in conjunction with Intel that is twice as fast as the previous DMA interface. DMA (and later UDMA) greatly reduces the amount of processing time the CPU had to use in order to read and write the disks. This is possible because DMA and UDMA allow the disk controller to write data to memory directly, thus bypassing the CPU.

UDMA was first introduced in 1998 with the ATA-4 or ATA/ATAPI-4 standard and is capable of transferring data at 33.3 MBps, which is how the UDMA/33 or Ultra-DMA/33 names came about. Since its initial release and the approval of new ATA standards, the below UDMA standards are available: UDMA/66; UDMA/100; UDMA/133. UDMA/66 and higher are only supported when an 80-wire 40-pin cable is being used.

Contact Us



+1 (707) 703-13-11

Term of the Day

Backup Software Glossary

Current glossary explains various terms that you may come across while working with Handy Backup or other backup software.

Handy Backup is a backup utility for Windows Servers and PCs that is famous for its flexibility and ease of use.

The glossary contains 219 terms. The current section Uncategorized contains 18 terms.

Other “Uncategorized” Terms

  • TSM Backup Software
    “TSM backup, where “TSM” is an acronym for “Tivoli Storage Manager” is a bunch of backup software solutions provided by IBM...”
  • Secure Sockets Layer
    “Secure Sockets Layer, or SSL, is a protocol that provides a secured communication on the Internet by encrypting the information. It is layered...”
  • SCSI (Small Computer System Interface)
    “ SCSI (Small Computer System Interface) , is a set of standards for physically connecting and transferring data between computers and peripheral...”

Who uses our backup software?