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Date: Mon, 20 Jul 1998 16:18:01 -0700 (PDT)
From: Doug White <dwhite@resnet.uoregon.edu>
To: Eric Patterson <ericp@ro.com>
cc: freebsd-questions@FreeBSD.ORG
Subject: Re: Qualstar 6110 and FreeBS 
In-Reply-To: <Pine.LNX.3.95.980717150753.26267B-100000@sh1.ro.com>
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On Fri, 17 Jul 1998, Eric Patterson wrote:

> Thanks again for your time.

No problem.

> I have an internal Western Digital 4 GB HDD at target 0.  At target 1
> is a Quantum DLT4000.  The DLT4000 is inside the autoloader.  At target 2
> I have a CMD TECH CRD-5440 RAID.  At target 3 is the changer.  The Adaptec
> host adapter is target 7.

Okay, just wanted to clarify.

> The changer and the DLT4000 are separate SCSI devices.  The changer does
> not communicate with the tape drive on the SCSI bus.  Both the changer and
> the DLT4000 are SCSI-2 devices.  The changer handles medium transport and
> storage.  The drive handles data transfer.

ok.

> So, on the back of the library, the host connects to the DLT4000. there is
> a SCSI bridge that connects the DLT4000 to the changer, then the changer
> is terminated.
> 
> Here's what dmesg has to say about the SCSI bus:
> 
> ahc0 <Adaptec 2940 Ultra SCSI host adapter>rev 0 int a irq 15 on pci0:15:0
> ahc0: aic7880 Wide Channel, SCSI Id=7, 16 SCBs
> ahc0 waiting for scsi devices to settle
> (ahc0:0:0): "WDIGTL WDE 4360-1807A3 1.80" type 0 fixed SCSI 2
> sd0(ahc0:0:0): Direct-Acess 4095MB (8388314 512 byte sectors)
> (ahc0:1:0): "Quantum DLT4000 D069" type 1 removable SCSI 2
> st0(ahc0:1:0): Sequential-Acess density code 0x1a,  drive empty
> (ahc0:2:)): Direct-Access 121564MB (248964352 512 byte sectors)
> (ahc0:3:0): "QUALSTAR TLS-4210 128b" type 8 removable SCSI 2
> uk0(ahc0:3:0): Unknown

ok.  Type 8 is a changer, so we'll need to build you a SCSI quirks table
entry to make this thing show up.  

Before we do that though, make sure that you have

device ch0

compiled into your kernel.  Looking at the quirks table, that section will
be ignored if you don't have that device compiled in.

If you do have ch0 in, starting at line 341 is the quirks table entries
for changers.  Try adding an entry like:
      
        {
                T_CHANGER, T_CHANGER, T_REMOV, "QUALSTAR", "TLS-4210", 
                "*", "ch", SC_MORE_LUS
        },

This forces the SCSI code to probe the device on all LUNs and appear as a
ch device.

Doug White                              | University of Oregon  
Internet:  dwhite@resnet.uoregon.edu    | Residence Networking Assistant
http://gladstone.uoregon.edu/~dwhite    | Computer Science Major


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