The only I/O Errors that we are seeing are on one of the paging volumes, BDCPG2:
q alloc page
EXTENT EXTENT TOTAL PAGES HIGH %
VOLID RDEV START END PAGES IN USE PAGE USED
------ ---- ------ ------ ------ ------ ------ ----
BDCRES 1D60 257 390 24120 18848 24120 78%
BDCPG1 1D64 1170 2169 180000 125162 180000 69%
BDCPG2 1D65 1 3338 600840 121703 198393 20% <== I/O Errors
------ ------ ----
SUMMARY 804960 265713 33%
USABLE 804960 265713 33%
<maint> Ready; T=0.01/0.01 13:58:34
I have already done the following in preparation:
1) ATTach 1D67 to MAINT
2) CPFMTZA FORMAT 0-end on a new volume, BDCPG3.
3) ALLOCATE 0-0 PAGE and 1-END PAGE.
Next Steps are:
4) CP Define cpowned slot 07 BDCPG3 <== Next available slot
5) DETach 1D67 from MAINT
6) ATTach 1D67 to system
7) CP Start DASD 1D67 page
8) CP Drain volid bdcpg2 all
Modify the SYTEM CONFIG file as:
CP_Owned Slot 6 BDCPG2 <== Existing
Drain VOLID BDCPG2 ALL <== New
CP_OWNED SLOT 7 BDCPG3 <== New
Scott R Wandschneider
Senior Systems Programmer|| Infocrossing, a Wipro Company || 11707 Miracle
Hills Drive, Omaha, NE, 68154-4457|| ': 402.963.8905 || Ë:847.849.7223 || ::
[EMAIL PROTECTED] **Think Green - Please print responsibly**
-----Original Message-----
From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Rob
van der Heij
Sent: Thursday, November 13, 2008 3:52 PM
To: [email protected]
Subject: Re: Risk of Adding a Paging Volume
On Thu, Nov 13, 2008 at 8:36 PM, Wandschneider, Scott <[EMAIL PROTECTED]> wrote:
> Thanks Dennis.
>
> Maybe with all the response I will get approval or not :)
One more from the peanut gallery... we don't get "I/O problems" on DASD these
days. That used to be in the old days where we still had platters with rust
that rotate... ;-) If you really have I/O problems then it would probably
affect the entire DASD subsystem, so you have also other things to worry about
(maybe someone on MVS using your volumes for something else?)
It may also be that the page volume was not correctly formatted and CP
complains and makes you *think* there are I/O problems on the device.
In that case it may be an incorrect operating procedure and your new volume may
be also bad. The page pack needs to be formatted completely with ICKDSF - not
just the first cylinder, as some (MVS) storage admin folks are used to.
Depending on what was there in the past, it may work for part of the volume.
If Q ALLOC shows you only a small number of pages in-use on that volume (about
the same as the number of errors you had) then that would be my guess.
Rob
