These are the release notes for rel10 of the driver :

If you are loading the driver as a module, you'll need to patch ksyms.c
	as follows :
 
--- ksyms.c	1995/07/22 02:17:53	1.2
+++ ksyms.c	1995/07/22 02:22:10
@@ -251,6 +251,7 @@
 	X(kill_sl),
 
 	/* misc */
+	X(do_gettimeofday),
 	X(panic),
 	X(printk),
 	X(sprintf),

The big change in this release is support for multiple outstanding commands.  
Ie, I'm able to backup a SCSI disk to SCSI tape, stream the tape while doing
that, and then rewind without locking myself out of accessing the disk :-)