OS-147 change defaults for SD_IO_TIME sd_failfast_enable and sd_ua_retry_count
OS-83 enable gcc warnings for sd
OS-14 sd attach should not issue potentially slow scsi commands
Portions contributed by Jeffry Molanus.
OS-14 sd attach should not issue potentially slow scsi commands (ddi-forceattach=1)
OS-92 NexentaStor 4.0.1-PASSIV-12022013: Cannot mount root after install
OS-97 fix for OS-92 is incomplete
OS-101 sd needs to check ATTACHING state before calling SD_IS_VALID_LABEL()
OS-104 handle attach-failure ereport
OS-91 mptsas does inquiry without setting pkt_time