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About JJR512

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    MD, USA
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  1. If you put two different-speed devices on the same IDE channel (cable), for example an ATA/100 hard drive and an ATA/33 CD-ROM drive, does the slower device slow down the entire channel, or can the faster device still work at its maximum speed? My theory is that they should both be able to work at their full speeds, since the controller cannot use both devices at the same time, therefore when the faster hard drive is being used, it's being used alone, so the slower CD-ROM drive shouldn't interfere with it. I'm looking for confirmation of my theory or refutement of it, along with supporting facts and explanations.
  2. JJR512

    About IBM trashed reputation!

    The only drive that's ever failed on me was a WD Caviar, a 3.2GB model from 1998. After that, I bought two Maxtors (not at the same time). My next hard drive will probably be a WD or IBM.
  3. JJR512

    IBM Deskstar 120GXP

    MTBF stands for Mean Time Before Failure. "Mean" is a mathmatical term that basically means "average". MTBF is the average amount of time something will last before it fails. An MTBF of 500,000 hours means most should last to about 500,000 hours, but some will last more and some less.
  4. JJR512

    IBM Deskstar 120GXP

    Since there seems to be no way to edit my message (that I can see), let me add on that yes, recording starts at the outside of the drive first, and as a drive fills up, recording moves inward. Programs like Norton Speed Disk can move infrequently used files to the inside of the platters, though, thus freeing up more outside room for the more frequently used files, the theory being that the more frequently you use a file, the faster it should be for you. As far as I am aware, data is never recorded by first filling up an entire side of a platter before moving to the next side, filling that entire 2nd side up before moving to the next platter, etc. I believe it is always done in cylinders.
  5. JJR512

    IBM Deskstar 120GXP

    Data is recorded cylindrically, that is, in cylinders. A platter is formatted with a series of concentric circles, or tracks. A cylinder is all the tracks from the same position, for example the 100th track from the center, on each platter. Data is recorded starting with the top of platter 1, then the bottom of platter 1, then the top of platter 2, then the bottom, and so on and so forth. (Or maybe it starts at the bottom, but that's not important.) The idea is to write and read as much as possible with as little head movement as possible.
  6. JJR512

    IBM Deskstar 120GXP

    I've read from other sources that in RAID-0 setups, IBM GXP drives usually show a better performance increase than other brands of drives. Can anyone confirm that this is, in general, true or not true, and speculate (or show with testing) that it is true with this specific model?