Chaparral K5312/K7313 - Manual (Page 126)

G- and K-Series User’s Guide
9-2
Problem: Nothing is displayed on the terminal emulator screen.
The probable cause of this problem is a bad RS-232 cable connection or swapped
transmit/receive lines. If the cable is properly connected on both ends, try a null
modem adapter that will reverse the RS-232 transmit and receive signals. The need
for a null modem adapter depends on both your enclosure and the RS-232 cable you
are using.
Problem: Screen is updated, but won’t respond to keystrokes.
Disable hardware flow control on the terminal or terminal emulator. The controller
supports XON/XOFF flow control and works properly in most cases with no flow
control.
Problem: Screen looks correct, but clock is not being updated.
Check to be sure that enclosure containing the controller is still powered on. If you
are using XON/XOFF, press the Ctrl key and the Q key simultaneously.
Problem: Screen is updated and menus appear right, but boxes around menus
look incorrect.
Try a different font in your terminal emulator program, such as Terminal. If you
cannot find a font that looks correct, set ASCII Display to Yes in the Display options
item of the Configuration menu.
Array Problems
Problem: Array is much smaller than it should be.
The backoff percent may be set higher than 1%, which is causing the array to be much
smaller than the full size of its member disks.
Note: We strongly recommend that you leave the backoff percent at 1%.
The setting backs off or reduces the capacity of the array by the given percentage. The
backoff percentage helps when you assign spares by compensating for the minor
capacity differences that occur between vendors. For example, two 18-GB drives
from two different vendors may differ in capacity by 100 MB. With a back-off of 0%,
you would not be able to replace an array member’s slightly larger 18-GB drive with
a smaller 18-GB drive. If you intend to only use identical drives from the same
vendor, then you can use a back-off of 0%.