Part 4 Maintenance and  upgrades This part of the book provides useful information about maintenance and upgrades. This part contains the following chapters: 443 ' Copyright IBM Corp. 2016, 2019. All rights reserved. GLYPH<SM590000> Chapter 16, “DS8870 to DS8880 model conversion” on page 489. GLYPH<SM590000> Chapter 15, “Remote support” on page 471 GLYPH<SM590000> Chapter 14, “Monitoring with Simple Network Management Protocol” on page 457 GLYPH<SM590000> Chapter 13, “Licensed machine code” on page 445