Tom, Do you have multiple LPARs sharing a single set of DASD? Do these multiple LPARs share a single SMS COMMDS? answer here should be Yes. Using the information stored in the Commds, SMS builds a Primary allocation list for those volumes that are below the high threshold value and a secondary allocation list for those volumes above the high threshold but having sufficient space to satisfy the primary allocation within 5 extents. Not sure if I recall correctly but there may be a third list comprised of volumes which might satisfy the allocation using SMS space contraint. HTH
________________________________ From: Kelman, Tom [mailto:Sent: Thu 8/30/2007 2:04 PM To: [email protected] Subject: SMS Allocations How does SMS determine the volume for the first extent of a new allocation? I thought it would first try to find for a volume in the pool where it could get the first allocation amount in one extent. However, based on what I've seen in trying to allocate a dataset that's not the case. It just seems to pick a volume out of the pool at random. Tom Kelman Commerce Bank of Kansas City (816) 760-7632 ---------------------------------------------------------------------- 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

