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Thread: Best IDE configuration

  1. #1
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    Best IDE configuration

    Hi all,

    Really easy stupid question for friday morning.

    IDE configuration.

    If I have only one HD and one CD type drive is it best to run them on seperate IDE cables or run them both off the primary ?
    technically this would make the HD the slave yes ? could this degrade performace.

    I've never given it much thought and just gone with what I've seen in previous cases.

    Cheers

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    It is best to run hard drives on one IDE cable, and then the optical drives on a completly separate one. As this improves performance when copying large amounts of data.
    There should be 4 settings:
    Primary Master
    Primary Slave
    Secondary Master
    Secondary Slave

    Primary = IDE 1
    Seconday IDE 2
    Will
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    sugar n spikes floppybootstomp's Avatar
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    Well, FWIW, this is how I'd do it. If just the one hard disk and only one optical drive, I'd put each on it's own IDE port and make them both masters.

    Two Optical drives and two hard disks, I'd put a hard disk and an optical drive on each IDE port, with each hard disk as master and each optical drive as slave.

    I understood that it wasn't really a good idea to put two optical drives on one IDE port as if you're copying from one to the other and they're sharing a cable, it could constrict data flow.

    In truth though, I've used all kinds of combinations and it's never seemed to make any difference, as far as I can tell.

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    But wont you do more copying to the hard drive? from optical drives?
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    sugar n spikes floppybootstomp's Avatar
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    blockers: You're probably right, it's just some advice I received years ago and it sort of made sense, so I stuck with it.

    I'll have to try and do a little research on this, I'm sure there's good reason for using the configuration I've listed.

    And like I say, I've often configured stuff more to the suit the cable length and device placement rather than any data flow considerations, it's always worked OK.

  6. #6
    www.5lab.co.uk
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    you want hdds and optical drives on separate cables

    reason for this is that optical drives dont support the high speeds of hard drives - occasionally they can do ata33 but more likely it will just be udma. if a hard drive is on the cable as well, the hard drives interface will be slowed down to this speed. not good. dont worry about 2 hard drives on 1 cable.. it might slow down disk-disk copying, but only a *touch* - and how often do you do this compared to straight single-disk reading?? also if you're running ata133, theres no 7200 hard drive that can use more than 50% of this bandwidth anyways..
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    blockers, actually, if you have 2 hard drives surely its better to put them on seperate IDE channels ? As in the example you gave, if you are moving large amounts of data, then it is faster to move large ammounts of data from one hard to another when they are on seperate channels, as 2 on one channel have to share the channel bandwith.
    Last edited by Lexeus; 05-03-2004 at 02:08 PM.
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    thought I would add in response to 5lab, yea the slow ata speed of optical drives means it isnt a great idea to mix hard drives and opticals.
    I actualy have my two optical drives on one channel, and then have each of my 3 hard drives on their own channel , its handy having the SATA interface as well
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    Hmm. And Hmm again Looks like I may have been wrong on this one all these years, any more input here? All my Optical drives are UDMA 2, Hard Disks UDMA 5, I wonder if they influence each other on same IDE port?

    I only have one machine set up like that, the other two are both RAID 0, one SATA, one IDE.

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    Now im a bit confused....well i will just stick with hard drives on one and opticals on the other

    Wil
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    Oh dear what have I started !

    I have no real idea but it sounds more logical to have the HD's on one IDE and opticals.
    If you have a HD and optical on one IDE the cable can't run at both speeds can it ? so it would only run at the highest speed that the optical can run at.

    I think I'm gonna go with having HD's and opticals on seperate IDE's

    Have a good weekend all

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    For me, I have HDD 1 as Primary Master, CD-RW as Primary Slave, HDD 2 as Secondary Master and DVD-ROM as Secondary Slave. HDD to HDD copying is at it's fastest possible, and CD to CD copying is too.

    If I need to copy something from CD to my main HDD I use my DVD-ROM on the Secondary so it's also at it's fastest and the same goes for HDD 2, I use the CD-RW. I only ever write from HDD 2 to my CD as that's where I have all my music, docs and setup programs and stuff.

    So as you can see I use both Primary and Secondary channels for nearly everything I do.

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    That sounds like a sensible set up there Big_Al....sadly i only have a hard drive and CD-rom drive....

    Will
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    Junior Senior Member Aaron's Avatar
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    Putting a HD and a 'legacy' device (like a CD-ROM drive) on the same cable will reduce both of them to the speed of the slowest device, apparently.

    Bearing this in mind, putting both your HDs on one cable and both your CD drives on the other is the best bet.

    Having said that, most modern motherboards have two IDE connections and at least two RAID connections, meaning you can run all four off seperate cables.

  15. #15
    sugar n spikes floppybootstomp's Avatar
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    Am I going looney or is Big Al's setup exactly what I suggested in an earlier post?

    OK, I didn't know exactly why he had it set up like that, but it seems like a good idea how it's configured.

    After thinking a lot about this, I think I'll go for optical devices on one IDE connection and hard disks on the other. But me still confused a bit

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    Well, on every computer i have set up, i put the hard drives on one IDE, and optical on another. This one is set up exactly the same way and i have no complaints at all. i have always used this setup. Its the way i was taught to do it.

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