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to a saved text file using the First or Last selector followed by the number of entries re-‐
quired. Control Trace can start, stop, or reset a Trace display in progress.
The Trace details page can be used to check for bad sectors, drive read/write errors, and
stuck processes. When you click the ‘Display Trace’ button from the Configurations and
Log Files menu, the Trace Details are shown as above. The Previous 25 Trace Entries or
Go To Entry fields allow you to navigate forward and backward to specific entries.
Time:
The time the command started. It will almost always be the same for all 25 entries,
unless a process is taking longer than it should.
Entry:
The entry number of the command used for reference. You can use the ‘Go to En-‐
try’ field to jump to a particular entry.
uGap:
The time in microseconds between this event and the next event in line.
uSecs:
The time in microseconds it took to complete the command.
User:
The name of the user that performed the command.
Lun#:
The number of the LUN that was targeted by the command.
Lun:
The name of the LUN that was targeted by the command.
CDB:
“Command Data Block” describes the command that took place. In the chart above
‘READ’ means the array was reading from disk. ‘10’ refers to the block size of the transfer
operation – 10 bytes.
Logical LBA:
Is a reference to the logical sector among the Hard Drives that the command
had targeted.
QOS 8-Bay User Manual
QOS Server is a subsidary of Ocean Tides Productions Ltd. © Copyright 2013
