The number of control units doesn't make a difference to VM. From a
performance perspective, just make sure you always have at least 1
preferred path on-line to each DS6000 disk.
Steve Wilkins
z/VM I/O Strategy
"Edward M.
Martin"
<[EMAIL PROTECTED] To
com> IBMVM@LISTSERV.UARK.EDU
Sent by: The IBM cc
z/VM Operating
System Subject
<[EMAIL PROTECTED] Re: 2105-800 FICON IOCP problem
ARK.EDU>
06/25/2008 02:35
PM
Please respond to
The IBM z/VM
Operating System
<[EMAIL PROTECTED]
ARK.EDU>
Hello Aria,
I have asked the same question.
Our IOCP for DS6800 with four 1 g ficon cards and two enclosures.
Each FICON card in the Z890 has two connections.
This way one card can fail and we still have access to all DASD.
Each dasd will have a preferred path too.
CHPID PCHID=130,PATH=30,TYPE=FC,SHARED .FICON DS6800
CHPID PCHID=131,PATH=31,TYPE=FC,SHARED .FICON DS6800
CHPID PCHID=140,PATH=40,TYPE=FC,SHARED .FICON DS6800
CHPID PCHID=141,PATH=41,TYPE=FC,SHARED .FICON DS6800
CU0130 CNTLUNIT CUNUMBR=0130,PATH=(30),CUADD=01, X
UNITADD=((00,256)),UNIT=2105
CU0140 CNTLUNIT CUNUMBR=0140,PATH=(40),CUADD=01, X
UNITADD=((00,256)),UNIT=2105
CU0131 CNTLUNIT CUNUMBR=0131,PATH=(31),CUADD=01, X
UNITADD=((00,256)),UNIT=2105
CU0141 CNTLUNIT CUNUMBR=0141,PATH=(41),CUADD=01, X
UNITADD=((00,256)),UNIT=2105
CU0230 CNTLUNIT CUNUMBR=0230,PATH=(30),CUADD=02, X
UNITADD=((00,256)),UNIT=2105
CU0240 CNTLUNIT CUNUMBR=0240,PATH=(40),CUADD=02, X
UNITADD=((00,256)),UNIT=2105
CU0231 CNTLUNIT CUNUMBR=0231,PATH=(31),CUADD=02, X
UNITADD=((00,256)),UNIT=2105
CU0241 CNTLUNIT CUNUMBR=0241,PATH=(41),CUADD=02, X
UNITADD=((00,256)),UNIT=2105
DV800 IODEVICE ADDRESS=(0800,256),CUNUMBR=(0130,0140,0141,0131), X
UNIT=3390
DV900 IODEVICE ADDRESS=(0900,256),CUNUMBR=(0241,0231,0230,0240), X
UNIT=3390
*
q dasd details 900
0900 CUTYPE = 1750-E8, DEVTYPE = 3390-0A, VOLSER = 530RES, CYLS = 3339
CACHE DETAILS: CACHE NVS CFW DFW PINNED CONCOPY
-SUBSYSTEM Y Y Y - N N
-DEVICE Y - - Y N N
DEVICE DETAILS: CCA = 00, DDC = --
DUPLEX DETAILS: --
CU DETAILS: SSID = 0002, CUNUM = 0230
q path 900
Device 0900, Status ONLINE
CHPIDs to Device 0900 (PIM) : 30 31 40 41
Physically Available (PAM) : + + + +
Online (LPM) : + + + +
Preferred : + - - +
Legend + Yes - No
Ed Martin
330-588-4723
ext 40441
-----Original Message-----
From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On
Behalf Of Aria Bamdad
Sent: Wednesday, June 25, 2008 9:28 AM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: 2105-800 FICON IOCP problem
Like Mark, I too do not have the UNITADD on the IODEVICE lines. If I
recall correctly, you use this parameter to reassign the device number
to something else. In your case, having them all 00 should/would cause
a problem.
This makes me wonder about my IOCP. I am not using a real 2105 but an
emulated 2105 (EMC box). Your IOCP has 8 CNTLUNIT macros with the
768 devices spread across all of them. My IOCP has 3 CNTLUNIT macros
with the 768 devices on them (256 on each).
>From the VM point of view, does anyone know if there is a performance
or other difference between having more or fewer control units defined?
Aria
On Wed, 25 Jun 2008 09:03:26 -0400 Mark Pace said:
>
>About the only thing I see different between mine and yours is the UNITADD
>on the IODEVICE. I don't have that in mine.
>
>On Wed, Jun 25, 2008 at 8:47 AM, daver++ <[EMAIL PROTECTED]> wrote:
>
>> Hi, we are in the process of migrating from an ESCON attached 2105-F20
>> to a FICON attached 2105-800. This is my first FICON IOCP, and I am
>> having some issues. We are on a z/800 running VSE (3.1.2) under VM
>> (5.2). The 2105-800 is attached directly to the z/800, no director. Here
>> is the IOCP I am trying:
>>
...snip
