Lee Hansen

Lee Hansen is president and chief consultant Turtle N Bear Corporation. He has achieved a Six Sigma Black Belt for Process Improvement, and has expertise in Unisys 2200 mainframe programming, database administration, and performance analysis. Reach him at

Articles by Lee Hansen

Using historically standard analysis techniques related to file placement on disks within the Unisys 2200 environment, it is possible to significantly improve the performance and capacity without significant additional outlays for hardware. Definitions of disk usage and file placement have been identified on a general basis as no longer relevant, as a means of following the "understanding" that modern disks provide sufficient native speed that file placement no longer matters. This is not a valid assumption.

Posted July 13, 2009