Which speed wins?

w^rl0rdw^rl0rd Member Posts: 329
Lets say you have an ATA-133 HDD (133MBps) and an UDMA 2 (16.6MBps) CD-ROM on the same EIDE cable;

Would the max throughput be 16.6MB?

Basically, does the slowest device on the cable determine the throughput?

Comments

  • w^rl0rdw^rl0rd Member Posts: 329
    Anybody?

    I'm in the middle of in intense argument right now and need some backup.
    I think it's based off of what device is the master.

    Help!!
  • JunkieJunkie Member Posts: 1 ■□□□□□□□□□
    I am sitting in my A+ cert class right now!! icon_lol.gif My teacher says that you are right. On an EIDE cable the slower speed applies.
  • CCIE2008CCIE2008 Member Posts: 7 ■□□□□□□□□□
    I am pretty sure that they are independent. If you check you BIOS you will notice the two different UDMA/PIO modes which indicate different speeds. As long as your motherboard has UDMA133 controllers and you are using a UDMA133 cable, your drive should operate at 133 and your CDROM at slower speeds. I have a data drive running at 133 and a cdrom on the same controller, which runs slower. I have used Sandra Benchmark to verify. There might be a posibility that older motherboards work like you are asking, but I am not positive.

    I hope this helps.
    CCIE2008

    MCSE, MCSA, MCDST, CCNP, CCDA, Security+, Linux+, Network+, A+, MOS
  • CCIE2008CCIE2008 Member Posts: 7 ■□□□□□□□□□
    One more additioin to my post. I would recommend that you put them on seperat controllers to reduce some I/O activity on the controller.
    CCIE2008

    MCSE, MCSA, MCDST, CCNP, CCDA, Security+, Linux+, Network+, A+, MOS
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