IBM i Series Handbook

iSeries Server 270 125
iSeries Server 270
For information on the #5075 PCI Expansion Tower, please refer to “#5075 PCI Expansion
Tower” on page 247.
Workstation Controllers
A 5250 twinax device or 5250 emulation adapter in a PC can support a single address,
multiple addresses, or shared sessions on a single address. Whenever a device is powered
on or when the 5250 emulation software is started on a PC, any addresses defined respond
to the workstation controller polls. These addresses count as an active address, even though
no device description may exist on the iSeries server. This occurs when the system value
QAUTOCFG is set to *NO.
• When a device has multiple addresses defined for multiple sessions to support jump
screen or to support an attached printer, each session counts toward the maximum active
addresses supported by that workstation controller.
• When a device has a single address defined with shared sessions, that device counts
as one of the maximum active addresses and up to four of the maximum shared
sessions.
There is a maximum of 300 shared sessions per IOP.
Model 270 #7104 System Unit Expansion
DASD Sidecar
Ri
g
ht
Back
Front
Fan
B03
330/625W
Power Supply
PO2
330/625W
Power Supply
PO2
D14
D12
D13
D11
D10
D09
DISK SLOTS
D20
D18
D19
D17
D16
D15
DISK SLOTS
Disk Unit Cage
#7123
Disk Unit Cage
Fan
B03

IBM i Series Specifications

General

Operating System	IBM i
Form Factor	Rack, Tower
Storage	SSD and HDD options
Security	compliance
Virtualization	IBM PowerVM
CPU	POWER processors
Scalability	Scale-up