Viavi Xgig User Manual page 336

Chapter 14, Using the Secondary Panes in Xgig TraceView
Exchange Age (us)
This column is shown for exchanges. It displays the total duration (age) of an exchange. For
pending exchanges, this column shows the duration from the beginning of the exchange until the
end of the capture. Age can only be displayed until microseconds; nanoseconds cannot be
displayed in this column even if the time format selected has nanoseconds in it. The time format is
the same as the Delta Time columns in the event grid the DWORD tab. If not all of the wire events
within an exchange are displayed, this column may be blank.
Delta Time
This column is shown for wire events. It shows the time elapsed since the previous wire event
within the same exchange. The time format is the same as the Delta Time columns in the event
grid the DWORD tab.
Cmd
This column corresponds to the command name that initiated the exchange, usually a read or a
write. This column is shown for exchanges.
LBA
This indicates the Target Logical Block Address for the command. This column is shown for
exchanges. If the command is a read, then the drive will start reading consecutive blocks starting at
that address. If it is a write, then the drive will start writing consecutive blocks starting at that
address.
Summary
The summary column is shown for both exchange and wire events. This column shows decoded
information for the exchange or wire event. If an alias is applied, the alias is displayed instead of
the decoded information. The
just like any other column.
Tag
This displays the queue tag for SATA or task tag for SAS of the first frame of a particular
command. This column is shown for exchanges.
LUN
This indicates the SCSI Logical Unit Number for the drive. Each drive on a SCSI bus has its own
LUN. This column is shown for exchanges.
Source
This displays the address of the host that initiated the command. This column is shown for
exchanges. Both the Actual Source Address and Hashed Source Address are displayed.
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column can be added to, moved, expanded, or deleted
Summary
Using the Exchanges View Pane
Xgig Analyzer User's Guide