This is a short description of a weird issue with two sites.

There was a bug in the ASIC programming in the DWDM that calculated the CRC
for a block of data. We had a very odd block in an image - a long run of
zero-bits, I think - that caused an invalid CRC to be generated. It was a
solid error. Every time the block tried to cross the river it got an I/O
error.

The fix was a patch to the ASIC code.

Hopefully this helps,

Rob Schramm 

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