On Sat, 28 Apr 2007 04:41:59 +0800, Ron Hawkins <[EMAIL PROTECTED]> wrote:
>Mark, > >Maybe it's a case of differing experience. The first time I came across >DEFRAG being used it was all about reducing seek on 3380, and I was >questioning the benefit of this on 3880-23 controllers. > I guess I should have qualified my response about not defragging for performance with disk arrays, but that was the part of your response that I quoted and was referring to. Back in the days of 3380 sled I remember using FASTDASD (CA) to create COMPAKTOR control cards to place data sets in specific order to reduce seek times. >The benefit of reducing seek with DEFRAG still crops up, even on this list. >I would bet that it is the performance improvement alluded to in some of the >responses. Yepper. Cheers, Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group: G-ITO mailto:[EMAIL PROTECTED] z/OS and OS390 expert at http://searchDataCenter.com/ateExperts/ Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
