>>I have a REXX which will reallocates an ISPF.PROFILE dataset if the allocation sizes are below what is needed for the latest "got to have" product.
There is a line in this REXX line in the code which allocates the new ISPF.PROFILE dataset with "SPACE(45 15) TRACK". If the target volume group in the UNIT parameter is SMS managed the allocated size is reduced to 38,15. If it is not SMS managed, this allocated size is 45,15. The SMS Storage class has "reduce % on allocation failure" of 0. (Nothing in data classes modifies allocation size). >>I don't understand how it is getting reduced to 38 from 45. Ideas? >>>>>>>>>>>>>>>>>>>>>>> Have you looked at the dataset extents? The primary allocation can use more than physical extent to satisfy the allocation. If your SMS pools are more fragmented than your non-SMS volume, the allocation might be made across more than 1 physical allocation. HTH's dd keller This e-mail message and all attachments transmitted with it may contain legally privileged and/or confidential information intended solely for the use of the addressee(s). If the reader of this message is not the intended recipient, you are hereby notified that any reading, dissemination, distribution, copying, forwarding or other use of this message or its attachments is strictly prohibited. If you have received this message in error, please notify the sender immediately and delete this message and all copies and backups thereof. Thank you. ---------------------------------------------------------------------- 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

