>What type of dataset? PS, PO, PDSE, ...? The optimal block size for PDSE >(FB-80, DSNTYPE=LIBRARY) is 32720.
Yes, its about PDSEs. Kind a makes sense, sure. However I have been using PDSEs for a long time and don't seem to remeber to have seen this. Must have been blind (meaning I didn't care to look to carefully), obviously. Did this change with z/OS V2.1? -- Peter Hunkeler ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
