has not successfully made the transition then logic 702 may update data structures 704 to indicate an error condition on the blade step 810 alternatively a bus protocol may be implemented such that the blade sends an acknowledgment to logic 702 eliminating the need for polling if logic 702 determines that the blade has successfully made the requested state transition then it may update data structures 704 to so indicate step 812 fig9 illustrates a blade 900 for inclusion in a blade enclosure blade 900 preferably includes a mechanism for causing itself to enter a working state from a sleeping state and vice versa one such mechanism is as follows an ospm acpi compliant operating system 902 may be provided for execution by cpu 904 bus interface 906 may be coupled to bus 118 and to status and control bits 908 both status and control bits 908 and cpu 904 may be coupled to an acpi compliant chipset 912 preferably status and control bits 908 include at least one power mode control bit 910 which bit or bits play the role of the sleep and wake bits described above fig1 11 illustrate preferred behaviors for blade 900 referring now to fig1 power mode bits 910 may be set in step 1000 to indicate a sleep signal which signal is forwarded to acpi chipset 912 operating system 902 in association with the underlying bios then causes the blade to move from the working state to whichever sleep state is indicated by the sleep signal as suggested in steps 1002 1004.