Monthly Archives: April 2014

SQL Server bitmap operators, bitmasks and bit arrays 1

In this post I cover what bitmap and bitmasks are, before I can do that I need to make sure you are up-to speed on binary, base 2 and how the bits are layed out in data. Binary Binary (Base 2) is used throughout computer systems, the Windows platform amongst others relies on it. Base […]

Maximum IOPS for a 10K or 15K SAS Hard Disk Drive is not 170! 5

At times, mmm quite often now actually (perhaps it’s because I’m getting older and more grumpy) the industry I’m part of really makes me embarrassed, all too often folk just quote things they’ve seen on Wikipedia or via word of mouth without even a basic knowledge of the “fact” they are quoting – a “fact” […]

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