Upgrades to iSeries 8xx Servers206 iSeries HandbookUpgrade ScenariosTo help you understand what is involved in upgrading to the 8xx servers, this section lists theoverall steps involved for selected scenarios.From 7xx servers1. Perform a model upgrade.2. Do a processor feature conversion.3. Do an interactive card feature conversion.From another 8xx server1. Perform a model upgrade.2. Do a processor feature conversion.3. Depending on the “from” and “to” models, an interactive card feature conversion may alsobe required.Once within an 8xx server, performance upgrades are simply made through processor orinteractive feature conversions.Migration considerations• Most I/O supported on V4R1 or later are also supported on the 8xx models.– Features currently supported in 7xx servers remain valid on 8xx servers by using amigration tower. Some of these features cannot be ordered on new 8xx servers.– Features unique to 8xx servers are installed only in 8xx server system units andexpansion units.– Features unique to “upgrade from” models are installed in migration and expansiontowers attached to 8xx servers.• No Model 730, or 740 main storage features migrate.• Some Model 720 main storage features will migrate to 820 and 830 servers.Example Model 720 to Model 820 UpgradeWhen upgrading from a Model 720 to a Model 820, the following rules apply:• Ship the new 820 system.• Remove the existing processor from the 720 CEC.• Convert the old system to the #5034 or #5035 Migration Tower I:– Convert to #5034 if the 720 has 10 DASD positions– Convert to #5035 if the 720 has 15 DASD positions– Existing power supply is used on #5034/#5035
