you are correct.
-Cameron

-----Original Message-----
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of
Wiggins, Mark
Sent: Wednesday, December 22, 2004 08:32
To: [email protected]
Subject: Re: FCP question


Ok, so lets take this a step further. Is there a one-to-one correlation
between FCP channel on VM and WWPN on switch? In other words, this
works...

0xa210 0x1:0x5005076300d08276 0x0:0x502f000000000000
0xa310 0x1:0x5005076300d08276 0x0:0x502f000000000000

This does not...

0xa210 0x1:0x5005076300d08276 0x0:0x502f000000000000
0xa210 0x1:0x5005076300c28276 0x0:0x502f000000000000
0xa310 0x1:0x5005076300d08276 0x0:0x502f000000000000
0xa310 0x1:0x5005076300c28276 0x0:0x502f000000000000

Notice the difference in the WWPN's for each address.


-----Original Message-----
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of
Seader, Cameron
Sent: Wednesday, December 22, 2004 9:40 AM
To: [email protected]
Subject: Re: FCP question


This would be called multipathing.
-Cameron

-----Original Message-----
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of
Wiggins, Mark
Sent: Wednesday, December 22, 2004 07:37
To: [email protected]
Subject: FCP question


I've been reading through a lot of documentation and "Googled" the heck
out of this thing but have yet to run across what I want to do so I'm
questioning whether or not it's feasible. The question really revolves
around redundancy. In most references to connecting an FCP device to
Linux (we're running SuSE SLES8 on z/VM 5.1), they talk about connecting
1 FCP channel on VM, to 1 WWPN on a switch to multiple LUN's on the
shark. In other words, something like this
 
On VM
 
ATTACH a210-a211 TO LINUX1            (Documentation suggested a QDIO
pair of addresses)
 
On Linux
 
rmmod zfcp
modprobe qdio
modprobe scsi_mod
insmod zfcp loglevel=0 map="\
0xa210 0x1:0x5005076300d08276 0x0:0x502f000000000000"
modprobe sd_mod

With the key word mentioned above, "REDUNDANCY", is it possible/feasible
to do the following?
 
On VM
 
ATTACH a210-a211 TO LINUX1
ATTACH a310-a311 TO LINUX1
 
On Linux
 
rmmod zfcp
modprobe qdio
modprobe scsi_mod
insmod zfcp loglevel=0 map="\
0xa210 0x1:0x5005076300d08276 0x0:0x502f000000000000;\
0xa210 0x2:0x5005076300c28276 0x0:0x502f000000000000;\
0xa310 0x3:0x5005076300d08276 0x0:0x502f000000000000;\
0xa310 0x4:0x5005076300c28276 0x0:0x502f000000000000"
modprobe sd_mod

Notice the 2 different WWPN's for the 2 different addresses (a210 and
a310). Am I completely missing something here???
 
 
Mark Wiggins
University of Connecticut
Operating Systems Programmer
860-486-2792

 

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