Comment 2 for bug 1082965

Well, because no-one in the community seems to care; it seems the fix for this problem is to switch to SCST; http://www.zimbio.com/Ubuntu+Linux/articles/5vq_mlaTjIT/How+To+Install+SCST+on+Ubuntu

Seriously, this level of non-support is really a problem for people actively trying to make Ubuntu a player in the enterprise. If you wish to see it relegated to a non-entity or maybe a "play desktop" box then this is the right way to go about it. Refusing to even acknowledge what is a show-stopper bug is a big problem.

Under identical loads, SCST works wonderfully.