>>> On 12/13/2011 at 02:22 PM, "Shumate, Scott" <scshum...@bbandt.com> wrote: 
> Im trying to remove a LUN from an adapter on my RHEL5 server.  It fails
> with this error -bash: echo: write error: No such device or address
> 
>  
> Any ideas what I'm doing wrong?

You first have to tell the SCSI layer to delete the LUN from use.  Underneath 
the directory you were in, you'll see a subdirectory of "host?" where ? is the 
host number of the HBA.  Under that will be one or more rport* directories.  
Under those will be one or more target* directories, and under those will be 
one or more directories that look like the numbers at the end of the lszfcp -D 
display:
0:0:0:1
0:0:0:2
2:0:0:2
etc.

In those directories, you'll see a pseudo file named "delete".  You have to 
echo a 1 into that before trying to do the echo to unit_remove.  SUSE has 
zfcp_disk_configure, which we wrote for our customers.  I don't know if Red Hat 
has a tool to figure all that out for you or not.  Check the contents of the 
s390-tools RPM (I think Red Hat renames that though) and see if something 
similar is there.


Mark Post

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