Adaptec 7220ss User Guide

7-3

Troubleshooting

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, which
will reverse the RS-232 transmit and receive signals. The need for a
null modem adapter depends on both your RAID appliance and
the RS-232 cable you are using.

Problem: Screen is updated, but will not 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 the RAID appliance containing the controller
is still powered on. If you are using XON/XOFF, press the Ctrl+Q.

Problem: Screen is updated and menus appear correct, 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 disk
drives

Note:

We strongly recommend that you leave the backoff

percent at 1%.

The backoff percent 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