IBM 3590 - Manual (Page 29)

Table 2 identifies the various drive type indicators
2 of Figure 3 and Table 3
describes the panel areas it illustrates.
Table 2. Drive Type Indicator
Drive Type 3590 Base ULTRA 3590E
3590E with
Fibre
Channel
Non-Extended High Performance
Cartridge / older microcode
ULTRA 3590E N/A
Non-Extended High Performance
Cartridge / newer microcode ACF
B11 B11-U E11 E11-F
Non-Extended High Performance
Cartridge / newer microcode non-ACF
B1A B1A-U E1A E1A-F
Extended High Performance Cartridge
ACF
B11-X B11UX E11-X E11FX
Extended High Performance Cartridge
non-ACF
B1A-X B1AUX E1A-X E1AFX
Figure 3. Options and Status Screen
Chapter 3. Drive Operator Panel and Controls 9