Disconnect SCSI Target with multiple LUN's

Gerry.Houlder at seagate.com Gerry.Houlder at seagate.com
Thu Aug 8 14:03:12 PDT 2002


* From the T10 Reflector (t10 at t10.org), posted by:
* Gerry.Houlder at seagate.com
*

The operation you want is allowed by the SCSI standard. Specific product
implementations are allowed to be more restrictive, however. This appears
to be the case with the product you are working with. You will need to
contact the manufacturer of your product to get complete answer on how (or
whether) you can get the behavior you want.



                                                                                                    
                    Petit Laurent                                                                   
                    <laurent.petit@        To:     "'t10 at t10.org'" <t10 at t10.org>                    
                    barco.com>             cc:                                                      
                    Sent by:               Subject:     Disconnect SCSI Target with multiple LUN's  
                    owner-t10 at t10.o                                                                 
                    rg                                                                              
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* From the T10 Reflector (t10 at t10.org), posted by:
* Petit Laurent <laurent.petit at barco.com>
*
Hello,

I would like advise from somebody who has experience with multiple LUN's
within a SCSI device.
I have a SCSI device which has 2 LUN's. When accessing the first LUN, I
want
the Target to disconnect from the SCSI bus. Looking at the SCSI signals
with
a scope, I can see they are released and the initiator can send commands to
other SCSI devices on the bus.
The problem is when the initiator wants to access the other LUN. The
application using SCSI PASS-THROUGH waits until the command sent to the
first LUN completes before issuing a command to the other LUN.
Can anyone tell me if it is possible to have access to a LUN of a Target
which has previously disconnected from the SCSI bus with another LUN and
how
to do that ?

Thank you for your help.

Laurent Petit
Design Engineer
BARCO SILEX
Rue du Bosquet 7                   1348 Louvain-la-Neuve
Tel: +32 - 10 - 45 49 04      Fax: +32 - 10 - 45 46 36
Tel direct: +32 - 10 - 48 64 40
laurent.petit at barco.com            http://www.barco-silex.com


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