Print line if following line is missing

This is related to awk print 2 lines back if match but since my command has buffering issues that I'm unable to resolve I think a better approach would be to completely ignore stderr and look for output missing certain lines. So my output will be: Gathering drive descriptors ... Gathering data for drive 0 ... Drive Model: DataTraveler 2.0 Gathering data for drive 1 ... Drive name: id1,sd@n5000cca17096 Drive Model: HUH721010AL4204 Drive Speed: 7200 RPMs Drive Temp: 41 C Gathering data for drive 2 ... Drive name: id1,sd@n5000cca24156 Drive Model: HUH721010AL4204 Drive Speed: 7200 RPMs Drive Temp: 41 C Gathering data for drive 3 ... Drive name: id1,sd@n5000cca8749 Drive Model: HUH721010AL4204 Gathering data for drive 4 ... Drive name: id1,sd@n5000cca19183 Drive Model: HUH721010AL4204 Drive Speed: 7200 RPMs Drive Temp: 41 C Gathering data for drive 5 ... Drive name: id1,sd@n5000cca4607 Drive Model: HUSMH8010BSS204 Gathering data for drive 6 ... Drive name: id1,sd@n5000cca10152 Drive Model: HUH721010AL4204 Drive Speed: 7200 RPMs Drive Temp: 41 C And I would like to output the Drive name for any drive missing the Drive Speed and Drive Temp lines. Output should be: Drive name: id1,sd@n5000cca8749 Drive name: id1,sd@n5000cca4607 This is beyond my capabilities but I'm sure awk can do it but am not set on using awk, anything that accomplishes the task will work (don't have GNU tools). Thanks!