Believe it or not theres a verse in the bible that mentions this... (yes the bible is applicable to databases)

ecclesiastes 9:11 states; "time and unforseen occurence befall us all"

dont think anyone will argue with that lol

Major issues nearly always invlove more than 1 problem at a time. If problems occur one at a time, we, as dbas, take them in our stride and just deal with them as a matter of course - we call it bau support. perhaps an import job fails over night and at 9 am the business cant get report x. we re run the import manually and at 9.15 am the report is there. happy days.

if this happens at the same time as a disk failure, the server is slowed down by rebuilding the raid array onto a new drive and the report finishes at 9.45 instead of 9.15 - too late for the manager to take it to their bimonthly board review. and thats assuming the report doesnt slow down the system so much the end users are nagging us to can the report as it is affecting their productivity.

either one of those issues is bau on their own, when they occur at the same time however, they result in many people being cross -ourselves included.