IBM iSeries 270 Service Manual page 343

Position (listed in IOA Possible failing
assignment order) component
D06, D11 Disk unit
D07, D12 Disk unit
D08, D13 Disk unit
D09, D14 Disk unit
D10, D15 Disk unit
D17 Tape
DSA (BBBBCcbb)
The disk unit has the same
DSA as the IOP controlling
the storage IOA.
The disk unit has the same
DSA as the IOP controlling
the storage IOA.
The disk unit has the same
DSA as the IOP controlling
the storage IOA.
The disk unit has the same
DSA as the IOP controlling
the storage IOA.
The disk unit has the same
DSA as the IOP controlling
the storage IOA.
0001-20-00
Unit address
xy0100FF (where x is the same as
the first character of the xFFFFFFF
IOA Unit Address and y is I/O bus 0,
1, 2, or 3. Storage IOA I/O buses
begin with 0 and are numbered from
the tailstock 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 D06 or
D11.)
xy0200FF (where x is the same as
the first character of the xFFFFFFF
IOA Unit Address and y is I/O bus 0,
1, 2, or 3. Storage IOA I/O buses
begin with 0 and are numbered from
the tailstock 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 D07 or
D12.)
xy0300FF (where x is the same as
the first character of the xFFFFFFF
IOA Unit Address and y is I/O bus 0,
1, 2, or 3. Storage IOA I/O buses
begin with 0 and are numbered from
the tailstock 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 D08 or
D13.)
xy0400FF (where x is the same as
the first character of the xFFFFFFF
IOA Unit Address and y is I/O bus 0,
1, 2, or 3. Storage IOA I/O buses
begin with 0 and are numbered from
the tailstock 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
D14.)
xy0E00FF (where x is the same as
the first character of the xFFFFFFF
IOA Unit Address and y is I/O bus 0,
1, 2, or 3. Storage IOA I/O buses
begin with 0 and are numbered from
the tailstock 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
D15.)
610600FF
Analyze hardware problems
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