Recent | Who | Artists | Firewire | USB | Gfx | Windows | Mac | MacOS9 | IBM/DOS | ATARI ST | Midi Interfaces | Sequencers | MPCs | Roland "MC" | Roland "S" | E-mu | Ensoniq | Akai "S" | Samplers | soft-Samplers | Synths | soft-Synths (VSTi) | Roland "JV" | Modules | Drums | Tape | Mixers | hardware Effects | soft Effects | iOS | android | sw Timeline | Hackintosh This site exists to archive historical + crucial information related to computer assisted music production and related technologies; with the hopes of becoming a community of creatives who might make a significant intellectual contribution towards enhancing the quality of music production of both our generation and the next;  thanks for being here, and thank you for contributing. remember the past,  appreciate the present, and plan 4 the FUTURE >>>

Author Topic: PIO vs UDMA  (Read 834 times)

0 Members and 1 Guest are viewing this topic.

Offline chrisNova777

  • Administrator
  • Posts: 8930
  • Gender: Male
  • "Vintage MIDI Sequencing + Audio Production"
    • www.oldschooldaw.com | vintage audio production software + hardware info
PIO vs UDMA
« on: December 04, 2018, 04:21:19 PM »
http://www.dewassoc.com/kbase/hard_drives/difference_between_pio_dma.htm
Quote
The difference between PIO and DMA modes

There are two modes in which data can be transferred between an ATA hard disk drive and the computers system bus, and they are PIO and DMA.

PIO - Programmed Input/Output mode is the slower of the two modes,
having the capability of transferring data at a maximum burst rate of 16.7 MBytes per second.
PIO mode is also very CPU intensive and has no built in error correction.

DMA or UDMA - Single and Multiword DMA transfers do not support CRC,
and Single Word DMA is now considered obsolete
and multiword DMA, the predecessor to Ultra DMA, was never widely implemented.

Ultra DMA, which is also referred to as Ultra ATA, incorporates a Cyclic Redundancy Check (CRC) for error detection and correction.
You can review the Mandatory Requirements for Ultra-ATA here.

The following tables indicate the associated transfer or burst rates for different modes.
« Last Edit: January 03, 2019, 11:49:07 PM by chrisNova777 »