Old disks - same sector/track end to end newer disks - more sectors ouside ( 2-3 zones ) old disk tech rcb On Thu, 12 Jul 2001, Randy Zagar wrote: > > >While much of a disk's behavior (interleave, etc) is operating system > >specific, the outermost track is where sector 0 resides, and the innermost > >track is where the disk ends. The reason for this is because there are more > >sectors on the outer track, so reads will be faster at the outer track > >(since hard drives are fixed-speed and not variable-speed like CDROMs). > > I don't believe this statement is correct. The number of sectors per > track/cylinder is, I believe, a constant. Optimizing the interleave > becomes a much more complicated problem if sectors/cylinder is variable. > > The interleave is basically an indication of how much the disk is going > to rotate while the head is moving from one track to another. If the > number of sectors/cyl change as you move across the disk, then you would > need a different interleave for the outer and inner portions of the disk. > > Data on the outer tracks is written at a lower physical density (fewer > bits per inch) and is the reason why you have the higher signal-to-noise > ratio that was mentioned in another posting. > > -RZ > > p.s. If I'm wrong I'll accept that gracefully, but I don't think I am... > > > ----------------------------------------------------------------- > > This list is provided by the SecurityFocus ARIS analyzer service. > For more information on this free incident handling, management > and tracking system please see: > > http://aris.securityfocus.com > > -- - Richard Bond (rbondat_private (206) 605-3561 System Administrator K-351, Health Sciences Center Department of Molecular Biotechnology Box 357730 University of Washington Seattle, WA 98195 ----------------------------------------------------------------- This list is provided by the SecurityFocus ARIS analyzer service. For more information on this free incident handling, management and tracking system please see: http://aris.securityfocus.com
This archive was generated by hypermail 2b30 : Fri Jul 13 2001 - 16:45:15 PDT