Find part locations using location codes.
| Position | Possible failing item | DSA (BBBBCcbb) | Unit address |
|---|---|---|---|
| IOA and device DSAs do not conform to the following rules if the IOA is manually reassigned after IPL. | |||
| C01 (IXS capable position) | IOP | xxxx-20-00 | FFFFFFFF |
| C02 (empty if IXS in C01) | Storage IOA | xxxx-20-00 | 2FFFFFFF |
| C02 (empty if IXS in C01) | Communication or workstation IOA | xxxx-20-00 | E2FFFFFF |
| C03 | IOP | xxxx-24-00 | FFFFFFFF |
| C03 | Storage IOA | xxxx-20-00 | 4FFFFFFF |
| C03 | Communication or workstation IOA | xxxx-20-00 | E4FFFFFF |
| C03 | IXS attached IOA | xxxx-20-00 | E004FFFF |
| C04 | Storage IOA | The IOA has the same DSA as the first IOP found in the following list: C03, C01. | 6FFFFFFF |
| C04 | Communication or workstation IOA | The IOA has the same DSA as the first IOP found in the following list: C03, C01. | E6FFFFFF |
| C04 | IXS attached IOA | The IOA has the same DSA as the first IOP found in the following list: C03, C01. | E006FFFF |
| C06 | IOP | yyyy-20-00 | FFFFFFFF |
| C07 | Storage IOA | yyyy-20-00 | 2FFFFFFF |
| C07 | Communication or workstation IOA | yyyy-20-00 | E2FFFFFF |
| C08 | Storage IOA | yyyy-20-00 | 6FFFFFFF |
| C08 | Communication or workstation IOA | yyyy-20-00 | E6FFFFFF |
| C08 | IXS attached IOA | yyyy-20-00 | E006FFFF |
| D01, D07 | Disk unit | The disk unit has the same DSA as the IOP controlling the storage IOA. | 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 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 D01 or D07.) |
| D02, D08 | Disk unit | 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 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 D02 or D08.) | |
| D03, D09 | Disk unit | 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 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 D03 or D09.) | |
| D04, D10 | Disk unit | 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 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 D04 or D10.) | |
| D05, D11 | Disk unit | 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 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 D05 or D11.) | |
| D06, D12 | Disk unit | xy0F00FF (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 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 D12.) |
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