The following changes are important for driver development:
Due to changes in the way IRPs are allocated and stored, !irpzone is no longer a supported debugger extension command. See the Programmer’s Guide for more information on the replacement command, !irpfind.
Use the new !lookaside debugger extension command to examine lookaside lists. See the Programmer's Guide for more information on this command. See the Kernel-Mode Driver Reference for more information on lookaside lists.