Ted, While this is true for simple allocation, the STORGRUP is still an important factor when you want to do more than just Allocate, Open, and Close the dataset. Someone has mentioned possible issues with extending to another volume, but my particular nightmare came from a place I worked that was assigning and re-assigning volumes from one STORGRUP to another without checking for multivolume files. you know who you are :-(
The major problems came from VSAM entries spread across many STORGRUP, especially Alternate Indexes. Restoring these or recalling these files was a major headache, and about a third of the time resulted in us having to rebuild the Alternate Indices (some of these had 6xAIX). We never established if the backup/migrate caused the problem, but trying to move them into a single STORGRUP met with a greater incidence of failure. In the end we cleaned up setting all the volumes in one STORGRUP to DISNEW, merging the STORGRUP, and then moving the datasets with extents on the DISNEW volumes with DFSMSdss while redriving the ACS routines (if STORCLAS ne ' ' then STORCLAS = ' ', etc). This seemed to do the trick, and would be the method I recommend to the OP. Ron > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of > Ted MacNEIL > Sent: Thursday, May 28, 2009 12:43 PM > To: [email protected] > Subject: Re: [IBM-MAIN] Extend Storages defined in SMS > > >Seems to me if I remove the extend pool then SMS would have issues accessing > datasets that have extended to the extend pool. > > SMS does not access files. > It just determines where they go. > Once allocated (and catalogued), the file is fully accessible. > - > Too busy driving to stop for gas! > > ---------------------------------------------------------------------- > 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 ---------------------------------------------------------------------- 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
