Chapter 7. Advanced maintenance, troubleshooting, and diagnostics 411
Figure 7-60 Read Link Status Diagnostics window
Error counts are calculated from a baseline. The baseline can be manually reset by pressing
the Set Baseline button.
The columns displayed in the Read Link Status Diagnostics output are:
Devices A list of all of the storage subsystems on the Fibre Channel loop. The
storage subsystems appear in channel order, and within each channel
they are sorted according to the storage subsystem’s position within
the loop.
Controller/Port The controller ID or the port ID of the device.
ALPA ID The arbitrated loop physical address of the device.
Baseline Time The date and time of when the baseline was last set.
Sampling Interval The elapsed time between when the baseline time was set and when
the read link status data was gathered using the Run option.
ITW The total number of invalid transmission word (ITW) errors detected on
the Fibre Channel loop from the baseline time to the current date and
time. ITW might be referred to as the “Received Bad Character Count.”
LF The total number of link failure (LF) errors detected on the Fibre
Channel loop from the baseline time to the current date and time.
LOS The total number of loss of synchronization (LOS) errors detected on
the Fibre Channel loop from the baseline time to the current date and
time.
LOSG The total number of loss of signal (LOSG) errors detected on the Fibre
Channel loop from the baseline time to the current date and time.
PSP The total number of primitive sequence protocol (PSP) errors detected
on the Fibre Channel loop from the baseline time to the current date
and time.
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