To all DB2/VM server users: several instances of DB2/VM server abends with ARIYI36 05 have been reported to IBM lately when users migrated their DB2/VM servers to z/VM 5.20 running in a z9 hardware with VMDSS enabled. VM APAR VM63968 has been opened to address this problem. IBM z/VM development is currently, with the assistance of DB2 for VSE&VM Team, testing the fix for VM APAR VM63968. DB2/VM server's ARIYI36 05 abend is an "after the fact" situation. That means, DB2/VM server detects an "inconsistance" between the BDISK and the DBEXTENT when it requests CP to bring in a datapage from the DBEXTENT. With VMDSS support enabled, CP is responsible to move datapage between DASD(DBEXTENT) and dataspace then DB2/VM server moves the datapage from dataspace to its buffer for processing.The error could have been: 1) CP returns an incorrect datapage 2) the datapage returned has been previously stored on DASD incorrectly by CP If a user would like to migrate DB2/VM server to z/VM 5.20 running in a z9 hardware BEFORE the official PTF for APAR VM63968 is available, the recommendation is: 1) apply all available MCLs to z9 box; 2) apply all current VM APARs/PTFs, especially VM63978/UM31822; 3) disable VMDSS support in DB2/VM server; 4) if not possible to disable VMDSS support in DB2/VM server, the DB2/VM server should be archived more frequency.
With best regards, ...Roland Chung Senior Technical Specialist (S/390,VM/VSE,DB2/VSE&VM) MAXC Consultants Inc. Voice/Fax: 416-901-9442 (If busy, call: 416-469-2268) 197 Hastings Ave., Toronto, Ontario, Canada. M4L 2L6 ** Life is short. Stop once in a while and smell the roses. **
