The extent limit per volume for VSAM is still 123. 59 volumes is still the max vols limit. Total max extents vary depending on whether SMS stripping and/or extended addressability which would put the max at 4080 extents. If Extent Constraint relief is used, then the max is 7257.
Terry Traylor charlesSCHWAB TIS Mainframe Storage Management Remedy Queue: tis-hs-mstg (602) 977-5154 -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of L D Owen Sent: Monday, August 18, 2008 4:33 PM To: [email protected] Subject: Re: DASD Space Allocation >>I was surprised to read that on second and subsequent volumes, >>allocation is based on SECONDARY amounts. Just to confuse everything, VSAM rules are just the opposite. For VSAM datasets, the Primary is used on each subsequent volume for the initial extent (s) on that volume, and then Secondary for the remaining extents. So: Non-VSAM: Volume 1 (Primary, then Secondary), Volumes 2-n (Secondary) 16 Extents per volume, Max 59 volumes VSAM: Volume 1 (Primary, then Seconary), Volumes 2-n (Primary, then Secondary) Watch me be wrong about this one (123 Extents Maximum), no limit per volume If I'm wrong about the VSAM extents, please correct me. ...L ---------------------------------------------------------------------- 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
