>The problem with guids is they are not guaranteed to be unique: Hang on! I thought that was their major selling point. They are supposed to be sufficiently sparse and random over the 128 bits that the chance of collisions is really, really vanishingly small.
NEWSEQUENTIALID is supposed to re-seed itself randomly on each boot. I haven't observed or tested this, has anyone? If it does work this way then perhaps there is a greater chance of contiguous clumps of Guids overlapping from different sources, but I'll bet that's still miniscule. Oh but more, your NIC ID is part of the bits so that would prevent clashes from different machines. Greg
