No Yes
↓ Use the on-line problem analysis procedures to isolate the problem. Use
the WRKPRB (Work with Problem) command to determine if a recent
problem was entered in the problem log, or use the VFYTAP (Verify
Tape) command to run verification tests.
3. Clean the recording head in the tape unit.
4. Attempt the failing operation again.
Does the operation complete successfully?
No Yes
↓ The original data cartridge is defective. The problem has been
corrected.
This ends the procedure.
5. Look at the 4 rightmost characters of the Data display for word 1. These 4
characters are the unit reference code.
6. Find the unit reference code in the following table.
Notes:
1. If the failing item is a failing item (FI) code, go to “Failing Items” on page 479
to determine which part number associated with the FI code is failing.
2. If the failing item is a type number, go to “Type, Model, and Part Number list”
on page 885 to determine the part number.
3. If the failing item is a symbolic FRU, go to “Symbolic FRUs” on page 495 to
determine the part number.
Reference Code Description/Action Perform all actions before exchanging Failing Items Failing Item
9020 I/O processor detected a SCSI bus configuration error
Before exchanging any parts, verify that the following condition is not
present:
v Tape and DASD devices attached to an I/O Processor that does not
support Tape and Dasd devices at the same time.
UH7CNFG
FI00871
FI00130
9100 Interface error detected by I/O processor or by tape unit
If the attached device is an external device, do the following before
exchanging any parts:
1. If an interposer is required, make sure that it is connected between the
I/O processor and the SCSI cable.
2. Ensure that the SCSI cable is seated correctly, and that there are no bent
or damaged pins on the SCSI cable.
3. Ensure that a terminating plug is attached to the device end of the SCSI
cable.
FI00871
FI01112
FI00872
DEVTERM
9101 Fibre Channel interface error detected
If the attached device is an external device, do the following before
exchanging any parts:
1. Ensure that the Fibre Channel cable is correctly connected to the ports.
2. Clean the Fibre Channel connectors.
3. If there is a hub attached, verify that the hub is operational.
4. If there is a gateway device attached, refer to the gateway device
service documentation for additional problem analysis procedures.
5. refer to the tape device service documentation for additonal problem
analysis procedures.
FCIOA
FCDEV
FCCABLE
63A0
Chapter 2. Unit Reference Codes 157
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