Jesper Krogh wrote:
Can someone shed "simple" light on an extremely simple question. How do you physicallly get 48 drives attached to an LSI that claims to only have 2 internal and 2 external ports? (the controller claims to support up to 240 drives).
There are these magic boxes that add "SAS expansion", which basically splits a single port so you can connect more drives to it. An example from a vendor some of the regulars on this list like is http://www.aberdeeninc.com/abcatg/kitjbod-1003.htm
You normally can't buy these except as part of an integrated drive chassis subsystem. If you get one that has an additional pass-through port, that's how you can stack these into multiple layers and hit really large numbers of disks.
-- Greg Smith 2ndQuadrant US Baltimore, MD PostgreSQL Training, Services and Support greg@xxxxxxxxxxxxxxx www.2ndQuadrant.us -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
