W dniu 20.11.2020 o 03:08, Steve Lee pisze:
Dear,
These messages come out at the time of IPL in past few IPL cycle;
IEA213A DUPLICATE VOLUME 'RP@C03' FOUND ON DEVICES 3404 AND 4802.
IEA213A REPLY DEVICE NUMBER WHICH IS TO REMAIN OFFLINE
IEA213A DUPLICATE VOLUME 'RP@C04' FOUND ON DEVICES 3405 AND 4803.
IEA213A REPLY DEVICE NUMBER WHICH IS TO REMAIN OFFLINE
IEA213A DUPLICATE VOLUME 'RP@C05' FOUND ON DEVICES 3406 AND 4804.
IEA213A REPLY DEVICE NUMBER WHICH IS TO REMAIN OFFLINE
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My Research:
When systems starts initialization after loading it makes some set of volumes
needs to be offline due to saem volume label.
(In IODF part, all volumes listed above are "Offline=No")
Some of the volumes on these system has duplicate volume labels defined to
them, While making these volume offline system gets confused and generates
these WTORs to ask the operator which one to make offline when it finds two
volumes has same volume label.
There has not been changes to IODF. Storage team can give more clarification
about these volumes gets assigned with duplicate volume labels.
But they are also confused why it happens.
Any input will greatly be appreciated.
Short explanation:
During IPL z/OS scan all the volumes defined as ONLINE. Duplicates are
not allowed, so operator has to decide which one to KILL (vary offline).
Of course at the time there are no ISPF or other means to easily check
wich one is "better" or rather which one should be used. Note: duplicate
volser could mean just another volume with completely unrelated content,
but likely it is a copy of the volume with same name. In this case it is
very hard to find out which is copy, which is original and which volume
to use. Ask author of the copy!
Note: volumes are defined as available and further available volumes are
defined as ONLINE in OS Config part of IODF. And this is solution to
separate "primary" set of volumes and the clone set. OS Config PRIM will
make cloned addresses as unavailable or just OFFLINE. OS Config CLONE
will make primary volumes unavailable, but cloned volumes as ONLINE. And
voila - simple Flashcopy (Shadowimage, TF/Clone...) and you have clone
of your system and the clone can be IPLed with few changes in LOADxx
member.
Note2: A person who makes volume copies should be aware of OS Config
settings and generally should avoid scenarios like yours. It just
mistake made by the person.
--
Radoslaw Skorupka
Lodz, Poland
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