I'm trying to use a Dilog SQ739 SCSI controller with an RZ55 drive for
NetBSD.  Unfortunately, something is being very evil.  Reads work fine,
but bits get flipped when writing (seemingly random single bit errors
that may occur in bunches).  There are absolutely no error messages. 
The same thing happens on two different systems (a MicroVAX II and a
KA650 based system), and with two different RZ55 drives.

Has anybody successfully used an SQ739 with NetBSD?  Has anybody seen if
disk errors get reported to the operating system?  

BTW.  I tried the controller diagnostics.  Read without data compare and
write diagnostics work fine.  Read with data compare sometimes fails
immediately and other times it just works.  Unfortunately there is no
host DMA diagnostic.

-- 
|  Boris Gjenero <bgjenero@undergrad.math.uwaterloo.ca>              |
|  Home page:  http://www.undergrad.math.uwaterloo.ca/~bgjenero/     |
|  "Luke, you're going to find that many of the truths we cling to   |
|  depend greatly on our own point of view." - Obi-Wan Kenobi, ROTJ  |