I''m using DTrace''s anonymous tracing feature to trace through device drivers at boot time. With Solaris 10 Update 6 B5, I was unable to trace fbt based calls from the sd attach point. The error messages from the console are: NOTICE: enabling probe 0 (fbt::sdattach:entry) NOTICE: enabling probe 1 (fbt:::) NOTICE: enabling probe 2 (fbt::sdattach:return) NOTICE: enabling probe 3 (dtrace:::ERROR) do_relocate: bad strndx 0 do_relocations: /kernel/drv/amd64/scsa2usb do_relocate failed scsa2usb error doing relocations fcp error reading symbols do_relocate: bad strndx 0 do_relocations: /kernel/misc/amd64/fctl do_relocate failed fctl error doing relocations <plenty of error messages related to undefined symbols> I''d like to know if anyone else is encountering problems with anonymous tracing. The only way I''ve been able to recover is to reinstall the OS since this keeps repeatedly crashing at boot time. I saw 6703055 has been filed although my crashes appear to be different because of the relocation errors. Thanks, Sri