Module Name:	src
Committed By:	thorpej
Date:		Sat Aug 15 01:10:54 UTC 1998

Modified Files:
	src/sys/dev/scsipi: sd.c sd_scsi.c sdvar.h
Log Message:
Keep track if the disk has had done i/o, making it dirty.  On last close,
or at shutdown, flush the cache if the disk is still dirty and it support
cache flushing.  Fixes PRs #5588 (Jim Bernard) and #5589 (Justin Gibbs).