>Number:         1797
>Category:       kern
>Synopsis:       Quirk required for SCSI-1 Exabyte 8200 drive
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people (Kernel Bug People)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Nov 29 22:35:00 1995
>Last-Modified:
>Originator:     Paul Goyette
>Organization:
	none
>Release:        1.1
>Environment:
	Mac IIci, NetBSD 1.1
System: NetBSD pgoyette.bdt.com 1.1 NetBSD 1.1 (PGOYETTE) #160: Tue Nov 28 19:05:31 PST 1995 paul@pgoyette.bdt.com:/home/paul/src/sys/arch/mac68k/compile/PGOYETTE mac68k


>Description:
	Exabyte 8mm tape drive with SCSI-1 controller, and ROM version 
	263H has only 5 bytes of SCSI Page 0 information, not the default
	of 12.  Attempts to write more than 5 bytes cause the command to
	be rejected with an Illegal Request.  This particular tape drive
	requires a "quirk" to operate properly.
>How-To-Repeat:
	Build kernel with the default (no quirk data), or use the sample
	quirk data provided (but commented out via #if 0 ... #endif), and
	the drive will be unusable.
>Fix:
	Apply the following patch:

*** /usr/src/sys/scsi/st.c	Fri Oct 13 19:55:31 1995
--- /home/paul/src/sys/scsi/st.c	Sat Nov 25 12:22:24 1995
***************
*** 193,198 ****
--- 193,205 ----
  		ST_Q_FORCE_BLKSIZE, 1024, DDS,		/* minor 8-11 */
  		ST_Q_FORCE_BLKSIZE, 0, DDS		/* minor 12-15 */
  	}},
+ 	{T_SEQUENTIAL, T_REMOV,
+ 	 "EXABYTE ", "EXB-8200        ", "263H", 0, 5, {
+ 		0, 0, 0,				/* minor 0-3 */
+ 		0, 0, 0,				/* minor 4-7 */
+ 		0, 0, 0,				/* minor 8-11 */
+ 		0, 0, 0					/* minor 12-15 */
+ 	}},
  #if 0
  	{T_SEQUENTIAL, T_REMOV,
  	 "EXABYTE ", "EXB-8200        ", "",     0, 12, {
>Audit-Trail:
>Unformatted: