-- snip -- Then along came RAID arrays. . . . So, I ask, is I/O tuning still possible, or even necessary? -- snip -- Yes, even though most people don't bother. When your I/O response time and throughput are satisfactory, one tends to just leave it as it is.
You can pull RMF reports and look at the Ranks (in the case of an IBM ESS) and see which MVS logical volumes are mapped to them. You should ensure that critical Data sets that are very I/O intensive are also properly placed on the back end. John ---------------------------------------------------------------------- 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
