> > Yet further: Becuase of the enormous amount of storage available in these > RAID arrays, many companies hold _all_ their disk space requirements > within an array. Thus, you get disk space for the mainframe, the mid-range > systems and sometimes even the PCs all mixed up together on a physical > disk. A possible result of this is that disk being "hit" by several > disparate systems with consequent differences in performance reporting > data structure, accuracy and timing synchronization. >
Not exactly. I don't know about other vendors, but on IBM disk arrays you cannot have CKD (mainframe) and FB (unix, ;inux, windows etc) disks on the same physical disks. But yes, all customers I know mix disks from different OS on the same array. If you want to play you have to know internals of specific disk array. for example on ESS800 the closer to adapter disks are located, the better (in theory - shorter path). my $0.02 Marian ---------------------------------------------------------------------- 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
