Date: Mon, 03 Apr 1995 17:30:32 -0700 From: "Justin T. Gibbs" <gibbs@estienne.CS.Berkeley.EDU> To: bob@obiwan.pmr.com (Bob Willcox) Cc: freebsd-current@freefall.cdrom.com (freebsd-current) Subject: Re: aic7xxx.c: Target Busy console messages Message-ID: <199504040030.RAA08552@estienne.cs.berkeley.edu> In-Reply-To: Your message of "Mon, 03 Apr 1995 18:32:01 CDT." <m0rvvbF-00030nC@obiwan.pmr.com>
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>I have noticed that with my new AHA-2740 controller card I get repetitive > >ahc0: Target Busy > >Messages on the console when accessing my Exabyte 8200 tape drive. Did the probe say that it was a tagged queuing device? Does the device actually work regardless of the messages? >Is this message important? (The bt742a.c driver appears to not >issue a message for a busy status.) From the Exabyte EXB-8200 >User's Manual: > > "Busy status indicates the EXB-8200 is in the busy state. The > EXB-8200 is in a busy state when it is performing an internal > operation that prevents it from accepting another command until > the operation is complete. > > The EXB-8200 returns Busy status for a command request until > the busy state is released. After the busy state is released, > the initiator must reissue the command to the EXB-8200. When > the busy state is released, selection operation and commands > can be executed normally." > >>From this, it sounds to me that this is a rather normal condition >and that the driver should simply reissue the command (periodically) >until successful. Is this true of other devices as well? It does reissue the command. It just doesn't happen that often so I log it to the console. > >Comments? > >-- >Bob Willcox >bob@obiwan.pmr.com (or obiwan%bob@uunet.uu.net) >Austin, TX -- Justin T. Gibbs ============================================== TCS Instructional Group - Programmer/Analyst 1 Cory | Po | Danube | Volga | Parker | Torus ==============================================
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