IBM iSeries 270 Service Manual page 336

Position (listed in IOA
assignment order)
D01
D02
D03
D04
D05
D06
D07
D08
Table 2. IOP, IOA, and device address information for Model 270 System Unit Expansion
Possible
failing
Position component
D09, D15 Disk unit
D10, D16 Disk unit
D11, D17 Disk unit
D12, D18 Disk unit
D13, D19 Disk unit
D14, D20 Disk unit
324
Hardware (Remove and Replace; Part Locations and Listings)
Possible failing
component
Disk unit
Disk unit
Disk unit
Disk unit
Disk unit
Disk unit
Optical
Tape
DSA (BBBBCcbb) Unit address
The disk unit has the xy0100FF (where x is the same as the first character of the
same DSA as the IOP xFFFFFFF IOA Unit Address and y is I/O bus 0, 1 or 2. Storage
controlling the Storage IOA I/O buses begin with 0 and are numbered from the tailstock
IOA. toward the middle of the card. Find the storage IOA with the
same DSA and xFFFFFFF address, then trace the I/O bus cable
to determine if the position is D09 or D15.)
The disk unit has the xy0200FF (where x is the same as the first character of the
same DSA as the IOP xFFFFFFF IOA Unit Address and y is I/O bus 0, 1 or 2. Storage
controlling the Storage IOA I/O buses begin with 0 and are numbered from the tailstock
IOA. toward the middle of the card. Find the storage IOA with the
same DSA and xFFFFFFF address, then trace the I/O bus cable
to determine if the position is D10 or D16.)
The disk unit has the xy0300FF (where x is the same as the first character of the
same DSA as the IOP xFFFFFFF IOA Unit Address and y is I/O bus 0, 1 or 2. Storage
controlling the Storage IOA I/O buses begin with 0 and are numbered from the tailstock
IOA. toward the middle of the card. Find the storage IOA with the
same DSA and xFFFFFFF address, then trace the I/O bus cable
to determine if the position is D11 or D17.)
The disk unit has the xy0400FF (where x is the same as the first character of the
same DSA as the IOP xFFFFFFF IOA Unit Address and y is I/O bus 0, 1 or 2. Storage
controlling the Storage IOA I/O buses begin with 0 and are numbered from the tailstock
IOA. toward the middle of the card. Find the storage IOA with the
same DSA and xFFFFFFF address, then trace the I/O bus cable
to determine if the position is D12 or D18.)
The disk unit has the xy0E00FF (where x is the same as the first character of the
same DSA as the IOP xFFFFFFF IOA Unit Address and y is I/O bus 0, 1 or 2. Storage
controlling the Storage IOA I/O buses begin with 0 and are numbered from the tailstock
IOA. toward the middle of the card. Find the storage IOA with the
same DSA and xFFFFFFF address, then trace the I/O bus cable
to determine if the position is D13 or D19.)
The disk unit has the xy0F00FF (where x is the same as the first character of the
same DSA as the IOP xFFFFFFF IOA Unit Address and y is I/O bus 0, 1 or 2. Storage
controlling the Storage IOA I/O buses begin with 0 and are numbered from the tailstock
IOA. toward the middle of the card. Find the storage IOA with the
same DSA and xFFFFFFF address, then trace the I/O bus cable
to determine if the position is D14 or D20.)
DSA (BBBBCcbb)
0001-10-00
0001-10-00
0001-10-00
0001-10-00
0001-10-00
0001-10-00
0001-10-00
0001-10-00
Unit address
200100FF
200200FF
200300FF
200400FF
200E00FF
200F00FF
200600FF
200700FF