Table 50. IOP, IOA, and device address information for FC 5074 I/O Tower (continued)
Position Possible Failing Item DSA (BBBBCcbb)
Note: IOA and
device DSA’s will not
follow the rules
below if the IOA is
manually reassigned
after IPL.
Unit Address
D26 Disk Unit The disk unit has the
same DSA as the IOA
attached to the
internal cable
labelled ″R-2″.
x20300FF (where x is
the same as the first
character of the
xFFFFFFF IOA Unit
Address)
D27 Disk Unit x20400FF (where x is
the same as the first
character of the
xFFFFFFF IOA Unit
Address)
D28 Disk Unit x20500FF (where x is
the same as the first
character of the
xFFFFFFF IOA Unit
Address)
D29 Disk Unit x20600FF (where x is
the same as the first
character of the
xFFFFFFF IOA Unit
Address)
D30 Disk Unit x20700FF (where x is
the same as the first
character of the
xFFFFFFF IOA Unit
Address)
D31 Disk Unit The disk unit has the
same DSA as the IOA
attached to the
internal flat ribbon
cable.
x00100FF (where x is
the same as the first
character of the
xFFFFFFF IOA Unit
Address)
D32 Disk Unit The disk unit has the
same DSA as the IOA
attached to the
internal flat ribbon
cable.
x00200FF (where x is
the same as the first
character of the
xFFFFFFF IOA Unit
Address)
D33 Disk Unit The disk unit has the
same DSA as the IOA
attached to the
internal flat ribbon
cable.
x00300FF (where x is
the same as the first
character of the
xFFFFFFF IOA Unit
Address)
D34 Disk Unit The disk unit has the
same DSA as the IOA
attached to the
internal flat ribbon
cable.
x00400FF (where x is
the same as the first
character of the
xFFFFFFF IOA Unit
Address)
Locations and Addresses
Chapter 5. Locations, Addresses, and Part Listings 773
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