Ultra DMA


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Ultra DMA

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IDE

(1) (Integrated Development Environment) A set of programming tools for writing applications (source code editor, compiler, debugger, etc.), all activated from a common user interface and set of menus. IDEs are standard procedure for program development. See Eclipse, Xcode, Visual Studio, compiler and debugger.


IDEs Are Very Different
Programmers write, compile and debug their applications in these popular IDEs. The File, Edit, Windows and Help menus were removed in this example to highlight the remaining menus, which barely resemble each other. When switching to a new operating system platform, developers have to learn a whole raft of new program interfaces (APIs) while making it all work in a new IDE. See API.







(2) (Integrated Drive Electronics/Intelligent Drive Electronics) A hardware interface for hard drives and CD/DVD drives. Introduced in 1986 with 20 megabytes of storage, IDE became the standard, and storage grew to hundreds of gigabytes. Officially known as an AT Attachment (ATA) device (see AT bus), IDE's primary contribution was building the disk controller into the drive itself so that only a simple circuit was required on the motherboard. Optical drives use the ATA Packet Interface (see ATAPI). Also known as "Parallel ATA" (PATA), IDE/PATA was superseded by Serial ATA (see SATA).

Master and Slave
Two IDE drives share one cable and are configured as master and slave. Out of the box, drives are set to master, and switching jumper pins makes them slaves.

Myriad Names Over the Years
The following mean the same thing: IDE, ATA, IDE/ATA, EIDE, EIDE/ATA, Fast/ATA and PATA. Using a 100 MB/sec example, drives went by "ATA-100," "Ultra ATA-100," "DMA-100" or "Ultra DMA-100." For detailed specifications, see PATA/SATA specifications. See Cable Select, SMART HDD, hard disk interfaces and SATA.


PATA vs. SATA Cables
IDE/PATA cables took up a lot of room inside the case and impeded air flow. Motherboards had 40-pin sockets for optical drives and 80 pins for hard drives.







Fault Tolerant IDE
In the late 1990s, Arco was first to provide RAID 1 (mirroring) with "inexpensive" IDE drives rather than SCSI. This drive bay card plugged into the motherboard, and cables went to two drives (see RAID). (Image courtesy of Arco Computer Products, Inc., www.arcoide.com)
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References in periodicals archive ?
To reduce problems related to skew, 100MHz transfers (Ultra DMA Mode 5) must use 3.3V signaling (vs.
Ultra Direct Memory Access (Ultra DMA, or more accurately, Ultra DMA/33, also known as ATA-33) is a protocol for transferring data between a hard disk drive through the computer's bus to its RAM.
Current versions feature an ATAPI interface, which supports PIO mode 4, DMA multi-word mode 2, and Ultra DMA 33.
Dual Ultra DMA 33/66/100 hard disk interfaces and a 3.5"/5.25" floppy disk controller support rotational media.
Ultra DMA introduced CRC-based error detection in data packets as part of the ATA-3 standard.
Both the SCSI and IDE versions of the VXA-1 tape drive offer capacities up to 66Gb at 6Mb/s, with the VXA-1 IDE tape drive featuring an Ultra DMA mode 2 interface and the VXA-1 SCSI tape drive providing a Fast and Wide SCSI Ultra 2 LVD interface.
This extremely fast notebook PC includes 256-MB of RAM, a 20-GB Ultra DMA hard disk, an 8X DVD drive (built in), a 56K V.90 FAX/modem (built in), 64-bit 3D wavetable sound with dual built-in stereo speakers, a built-in 10/100 Ethernet interface and Windows 98SE installed.
The single-chip controller integrates an Ultra DMA IDE/Atapi controller, CD block decoder/encoder, CD-DSP, DVD-DSP, CD/DVD servo, CD wobble servo, CD write strategy, and CSS content protection authentication.
The Intel 810E2 chipset, which supports the 100MHz system bus, is designed to bring new features to value PCs including an advanced I/O controller, support for ATA-100 Ultra DMA hard drives and new USB controllers to support four 'plug-and-play' ports for system attachments and other consumer items.
In Ultra DMA mode, a specification recommended as part of the PC 98 System Design Guide, the drive offers burst transfer rates of 33.3 MB/sec.
The IDE Duplicator supports all IDE drives, including IDE, Enhanced IDE and Ultra DMA mode drives in both 2.5-inch notebook and 3.5-inch desktop interfaces (2.5-inch adapters sold separately).