IBM EXN1000, Hardware And Service Manual, Page: 47 / 94

7. In 60 seconds, the N series storage system recognizes the hot-added
EXN1000 expansion unit.
Error messages
The following error messages appear on your N series storage system console
if your attempt at hot-adding the EXN1000 expansion unit is unsuccessful.
Table 5. N series storage system console error messages
Error message Explanation
Open loop panic One of two reasons cause this error message to appear:
v The shelf-to-shelf cable between the now second-to-last unit
and the newly added EXN1000 expansion unit is defective or
is not securely fastened.
v The speed of the newly added EXN1000 expansion unit is
incorrectly set.
Soft address
panic
One of two reasons cause this error message to appear:
v There is an invalid disk shelf ID.
v The power was turned on before the disk shelf ID was
changed and the EXN1000 expansion unit was not
power-cycled after the disk shelf ID was changed.
Chapter 2. Connecting an EXN1000 expansion unit
17