Xref: utzoo comp.sys.amiga.hardware:2657 comp.sys.amiga:62198
Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!apple!oliveb!amiga!cbmvax!jesup
From: jesup@cbmvax.commodore.com (Randell Jesup)
Newsgroups: comp.sys.amiga.hardware,comp.sys.amiga
Subject: Re: Backup devices (was: Re: VCR Backup)
Keywords: WangTek, Syquest, removable media
Message-ID: <13344@cbmvax.commodore.com>
Date: 20 Jul 90 21:55:29 GMT
References: <1776@lpami.wimsey.bc.ca> <664@boink.UUCP>
Reply-To: jesup@cbmvax (Randell Jesup)
Organization: Commodore, West Chester, PA
Lines: 41

In article <664@boink.UUCP> harald@boink.UUCP (Harald Milne) writes:
>	I finally junked my 2090 in favor of the 2091, and lo, my Tandberg 150meg
>(It seems only capable of running in a select/deselect environment) began to
>function better.

>	The 2091 driver however introduced a new problem, which trashed my
>SCSI command block. Someone from CBM posted a partial scsidisk.h in 
>comp.periphs.scsi. CBM added to the end of the SCSIcmd structure for auto sense
>handling, which caused my data to get overwritten. This scsidisk.h is newer
>than what appears in the 1.3 RKMs and what ships with the latest Amiga C
>compilers, so beware. Also, a new flag was added to the SCSIcmd.Flags field.

	I didn't think we published the "old" version, but maybe the deadline
was before the new version was released by the SCSI working group.

>	Can anybody shed any light on these flags, their use, etc.? There's no info
>anywhere in the RKMs. 

	Autosense (SCSIF_AUTOSENSE) means that the drive will do a request
sense if an error is indicated for you, and put the results in the buffer
provided.  This is needed to use SCSIDirect in a multitasking environment.

>	Does anyone have the new scsidisk.h? 

	You can get it (and all the new include files) from CATS.

>	I'm basically stuck now, for some reason the 2091 hangs with the "activity"
>LED on. This is a real bitch to debug. I was lucky to stumble on the SCSIcmd
>being larger now than before, which gave me the weirdest SCSI status from
>the tape drive (invalid command, due to my internal command block being
>overwritten).

	Try setting your drives to "no reselection".  I think reselection will
still be used on the tape drive, but this might help (solid scsi activity light
usually means a scsi-bus lockup, where the driver and the chip/bus disagree
on what should be happening). 

-- 
Randell Jesup, Keeper of AmigaDos, Commodore Engineering.
{uunet|rutgers}!cbmvax!jesup, jesup@cbmvax.cbm.commodore.com  BIX: rjesup  
Common phrase heard at Amiga Devcon '89: "It's in there!"