i5/OS V5R3 & V5R4 support by server model

i5/OS V5R3 was the final release supported by models 170, 720, 730, 740 and SB1.

i5/OS V5R4 is the final release that will be supported by models 270, 820, 830, 840, SB2 and SB3.

The next release after i5/OS V5R4 is planned to be supported on models 800, 810, 825, 870, 890, 520, 550, 570 and 595.