User`s guide

B-4 StorageWorks Fibre Channel Storage Switch Service Guide
Error Conditions
The power-on LED flashes rapidly during a failure, but the CPU LEDs are
unaffected. A failure condition while bit 0 is active is not likely. Active
states on positions 1 through 4 indicate which quarter of memory generated a
failure.
A failed location is repeatedly and infinitely read and written - even in a case
where the data eventually matches – until power is removed. This condition
allows for scoping the bad signals. The failed location is written and read
16K times in each power-on cycle. The processor reads and writes the point
of failure at maximum speed.