The systems manager here has announced plans to migrate our VM/XA (CMS 5.6) 3380 DASD environment to 3390-3 DASD, and later to VM/ESA (CMS level undetermined at this time). Will either of these changes cause problems for LISTSERV? Are there software or configuration changes that will be required or advisable? Thank you in advance for any suggestions or pointers to documentation, etc. /Hobart Braden