Often OPTION DIAG98 is handed out without knowledge. - VTAM can profit of it, the GCS recovery machine needs it too if VTAM has it. (by default user VTAM and user GCS) - TCPIP can use it too I know of no other products that use it. OPTION DIAG98 allows to execute real I/O's, without too much CP checking, hence less overhead, but in the hands of the wrong "people" it can be used it to alter real storage. I think only CP's storage is protected. It is not the first time sample directory entries contain statements not required at all, a very common example: IUCV *SIGNAL
2009/1/14 Steve Wilkins <[email protected]>: > DDR does not use Diagnose x98; Therefore, there is no advantage. There must > be some other reason those ids have that authority. > > Steve Wilkins > IBM VM Development > z/VM I/O Strategy > > "Boyer, William" ---01/14/2009 11:15:00 AM---We are attempting to create a > baseline for our z/VM system and one of the documents we are using states > that DIAG98 should not > > > From: > "Boyer, William" <[email protected]> > To: > [email protected] > Date: > 01/14/2009 11:15 AM > Subject: > DIAG98 on OPTION statement > ________________________________ > > > We are attempting to create a baseline for our z/VM system and one of the > documents we are using states that DIAG98 should not be used and I would > like to understand a little more about DIAG98. > > I see that TCPIP, TSAFVM and other IBM supplied userids have DIAG98 on the > OPTION statement and that does not concern me. (I can say that IBM made me > do it for those supplied userids.) However, I see that DIAG98 is also turned > on my userid and on some userids that are used to copy fullpacks using DDR. > Is there an advantage to have DIAG98 turned on to do full volume DDR's? > > Here is the option statement for those DDR userids: > OPTION DEVMAINT MAINTCCW DIAG98 > > > Thanks. > > > William Boyer > Senior Technical Support Specialist > ViPS, a General Dynamics Information Technology Company > Business & Technology Services > One West Pennsylvania Avenue > Baltimore, MD 21204 > Tel. 410.832.8300 > Fax. 410.832.8329 > [email protected] > www.vips.com > > This message is confidential, intended only for the named recipient (s) and > may contain information that is privileged or exempt from disclosure under > applicable law. If you are not the intended recipient (s), you are notified > that the dissemination, distribution or copying of this message is strictly > prohibited. If you receive this message in error or are not the named > recipient (s), please notify the sender at either the fax address or > telephone number above and delete this message. Thank you. > > > > -- Kris Buelens, IBM Belgium, VM customer support
