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CD-ROM PIO4/DMA Question

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  • CD-ROM PIO4/DMA Question

    I'm having a "problem" with my CD Drives. I currently have a 52x CD-ROM (forget the brand...it was cheap) and a Plextor 16/10/40x CD-R/W connected on the same IDE Channel/cable. When I had my KG7-RAID the drives where reported as being in PIO4 Mode..so I assumed that it was the crappy VIA IDE controller or something causing the problem. I just recently upgraded to a Asus A7S333 board and at the last time I could see it, the Mobo was reporting the drives still as PIO4 mode. I was under the assumption that modern IDE CD-ROM drives ran in UDMA/33 Mode. On both boards they where set to Auto detect. I'm figuring its either the cable or the CD-ROM causing problems, but the problem I have is that now when the computer boots up it goes through the IDE autodetect then to the Promise BIOS and then XP starts to load...all with out showing what the CD-ROM and CD-R/W are running in each mode. Any suggestions besides swapping out the cables? Or am I lookig into this too much?
    Why is it called tourist season, if we can't shoot at them?

  • #2
    I seem to recall that to get the x16 cdrw plextor drives to use dma transfers, you had to jumper the drive at the rear & I don't mean the master/slave setting!

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    • #3
      ayoub_ibrahim is right, you have to set a jumper. I don't know which one for sure but check www.plextor.be...
      Who is General Failiure and why is he reading my drive?
      ----------------------
      Powercolor Radeon 9700np, Asus A7N8X mobo bios ver. 1007UBER, AthlonXP2800+@3200+ (200 Mhz fsb, 2.2 Ghz) on TT Silent Storm, 2*256Mb Kingston HyperX PC3500 DDR-RAM, 19" Samsung 959NF monitor, Pioneer A04 DVD-RW, Two WD800 80 GB HDD's, IBM Deskstar 40 GB

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      • #4
        I had a similar problem once, I solved it with making the Plextor the master drive, for some reason it doesn't use dma being a slave.

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        • #5
          Originally posted by Hunsow
          I had a similar problem once, I solved it with making the Plextor the master drive, for some reason it doesn't use dma being a slave.
          I RTFM the other day after reading this post and noticed that Plextor Suggested the same thing! Though under XP its showing the Plextor drive as using UDMA2 and the CD-ROM as PIO4. I'm gonna swap around the cables and see what it does..I'm still having problems with Popping on CD-ROM drive when I play games that run music off the CD, though it doesn't do it with musical CDs. I guess I'm trying to find an excuse to get the the liteon DVD drive thats considered one of the best CD-readers out there
          Why is it called tourist season, if we can't shoot at them?

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          • #6
            That's funny, I have the lite-on dvd as the slave. Works great, both at UDMA2.

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