Alan, Doesn't that require "playing games" with genning different subchannel addresses to different LPARs, but using the same device numbers in those different LPARs? I guess what I'm trying to get at is, if you look at the available subchannels on a given OSA, any given triplet of addresses can only be used by one LPAR, regardless of what device numbers the LPAR may see. Correct, or not?
Mark Post -----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Alan Altmark Sent: Thursday, August 31, 2006 12:29 PM To: [email protected] Subject: Re: can LINUX/390 and z/OS LPARS share devices? On Thursday, 08/31/2006 at 12:11 AST, "Post, Mark K" <[EMAIL PROTECTED]> wrote: > As I stated in my reply to your original question, you cannot share the > same device numbers across LPARs. You can use different device numbers > on the same OSA across LPARs. (Alan will correct me if I'm wrong.) You > do know you have 240 available device numbers per OSA port, don't you? You *can* have the same device number in different LPARs, but sysprogs who do that are eventually found at the bottom of the nearest lake. And, yes, you can share an OSA across LPARs if the I/O configuration contains the needed definitions. OSA Express2 has 1920 devices on it, allowing up to 640 IP stacks to share it. You can imagine, however, what happens to sysprogs who try to put 640 IP stacks on one OSA after the first time someone disables the OSA port or trips over the cable. (They don't get a second chance, if ya know what I mean....) OSA Express has 480 devices, for up to 160 stacks. Alan Altmark z/VM Development IBM Endicott ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
