Product data
SCSI Interface Card Power-On Self-Tests (POSTs)
The SCSI interface card POSTs start each time power is switched on, or when a Reset
command is sent from the using-system SCSI attachment. They check only the internal
components of the SCSI interface card; they do not check any interfaces to other
FRUs.
If the POSTs complete successfully, control passes to the functional microcode of the
SCSI interface card. This microcode checks all the internal interfaces of the 2104, and
reports failures to the using system.
If the POSTs fail:
v The SCSI interface card Check light and the 2104 Check light come on.
v The functional operation of the 2104 is not affected. For example, the customer still
has access to all the disk drive modules.
v If a second SCSI interface card is present, it becomes the SES active card.
v The failure is reported:
– If the failure occurs at system bringup time, the using system might detect that the
2104 is missing, and reports an error.
– If the failure occurs at any time other than system bringup time, the hourly health
check reports the failure.
Service Request Numbers (SRNs)
Service request numbers (SRNs) are generated for the 2104 by diagnostics and the
SES healthcheck (see “Error Logging” on page 3). SRNs help you to identify the cause
of a problem, the FRUs, and the service actions that might be needed to solve the
problem.
The SRN Table
The table in this section lists the SRNs and describes the actions you should do. The
table columns are:
SRN The service request number.
FRU list The FRU or FRUs that might be causing the problem (see also “FRU Names
Used in the SRN Table” on page 39), and how likely it is (by percentage) that
the FRU is causing the problem.
Problem A description of the problem and the action you must take.
38 2104 Service Guide