NIST just released the test reports for two software write blockers by Booz, Allen, Hamilton. They tested version 5.02.00 for Microsoft Windows 2000 and version 6.10.00 for Microsoft Windows XP. The tests identified anomalies in both versions.
Both reports state in unison:
The tool blocked all SCSI-2 commands from the WRITE category but failed to block most of the SCSI-3 commands in that category. The tool also failed to block four internal IRP functions from the WRITE category. The tool did not block any of the commands from the VENDOR_SPECIFIC and UNDEFINED categories.
