I wasn't certain what VSL to download when I received my ioDrive with firmware 6.0.0.107006. I thought it may be helpful to compile a list of firmware revisions.
fusion_3.2.10-20150212.fff (Windows, 3.2.10)
FPGA 7.1.17.116786
fusion_3.2.8-20140508.fff (Windows, 3.2.8)
FPGA 7.1.17.116786
fusion_3.2.6-20131003.fff (Windows, 3.2.6)
FPGA 7.1.15.110356
fusion_3.2.4-20130604.fff (Windows, 3.2.4)
FPGA 7.1.15.110356
fusion_3.2.3-20130605.fff (Windows, 3.2.3)
FPGA 7.1.13.109322
fusion_3.2.2-20121025.fff (Windows, 3.2.2)
FPGA 7.1.13.109322
iodrive_108609.fff (ESXi-5.0, 3.1.1)
FPGA 6.0.2.108609
iodrive_107053.fff (Windows, 2.3.11)
FPGA 5.0.7
fusion_3.2.10-20150212.fff (Windows, 3.2.10)
FPGA 7.1.17.116786
fusion_3.2.8-20140508.fff (Windows, 3.2.8)
FPGA 7.1.17.116786
fusion_3.2.6-20131003.fff (Windows, 3.2.6)
FPGA 7.1.15.110356
fusion_3.2.4-20130604.fff (Windows, 3.2.4)
FPGA 7.1.15.110356
fusion_3.2.3-20130605.fff (Windows, 3.2.3)
FPGA 7.1.13.109322
fusion_3.2.2-20121025.fff (Windows, 3.2.2)
FPGA 7.1.13.109322
iodrive_108609.fff (ESXi-5.0, 3.1.1)
FPGA 6.0.2.108609
iodrive_107053.fff (Windows, 2.3.11)
FPGA 5.0.7