Dean, If one follows the IBM recommendations then you are configuring PLPA and Common for a non-cached, non-RAID 4200 RPM SLED, and in that case they should go together with PLPA in front. Of course that device hasn't been built or shipped for 10% of a century.
In actual fact 2/3 of one Virtual Cylinder fits on one track of a 10,000 RPM 146GB disk drive, and many Virtual Cylinders fit within a Physical Cylinder, and those Logical and Physical Cylinders are striped and/or mirrored across many disks, with arm movement that is being influenced by much more than the activity of the Logical Volume. There is alternatively far more and far less seeking going on then you can ever tell by looking at things from the Host. In other words, the answer to your question is no. This is different to the IBM recommendation, but it is the answer to your question. Like many IBM recommendations of this era, they are well overdue for review, update and removal of unnecessary advice like this one (referring to PLPA and Common being adjacent). Ron > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On > Behalf Of Dean Montevago > Sent: Wednesday, 27 July 2005 12:29 AM > To: IBM-MAIN@BAMA.UA.EDU > Subject: Re: ILR005E PLPA PAGE DATA SET FULL > > so do they have to be allocated next to one another ? > ---------------------------------------------------------------------- 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
