IBM i 830 Repair Manual page 786

Locations and Addresses
772
iSeries Model 830, 840, SB2, and SB3 Problem Analysis, Repair and Parts V5R1
Table 50. IOP, IOA, and device address information for FC 5074 I/O Tower (continued)
Position Possible Failing Item DSA (BBBBCcbb)
D21 Disk Unit
D22 Disk Unit
D23 Disk Unit
D24 Disk Unit
D25 Disk Unit
Unit Address
Note: IOA and
device DSA's will not
follow the rules
below if the IOA is
manually reassigned
after IPL.
The disk unit has the x20300FF (where x is
same DSA as the IOA the same as the first
attached to the character of the
internal cable xFFFFFFF IOA Unit
labelled "L-1".
Address)
x20400FF (where x is
the same as the first
character of the
xFFFFFFF IOA Unit
Address)
x20500FF (where x is
the same as the first
character of the
xFFFFFFF IOA Unit
Address)
x20600FF (where x is
the same as the first
character of the
xFFFFFFF IOA Unit
Address)
x20700FF (where x is
the same as the first
character of the
xFFFFFFF IOA Unit
Address)