> diff -c sd.c sd.C
>         /*
>          * do a "mode sense page 4"
>          */

please add some comments above this line so it doesn't get removed again
when there is another optimisation run through the src :-)

> +       bzero(&scsi_sense, sizeof(scsi_sense)); /* DMS */
>         bzero(&scsi_cmd, sizeof(scsi_cmd));
>         scsi_cmd.opcode = MODE_SENSE;
>         scsi_cmd.page = 4;