Ingo Adlung wrote:
VM doesn't shield from Linux that there is 6 paths available, but Linux
sees them, too. I.e. if you vary CHPIDs offline the guest Linux will also
see them disappear. But you are also on the safe side with Linux as we can
handle channel outages, no matter if running under VM or LPAR. Assuring
such is part of a rigid device qualification program :-)
That is nice to know. However when we swapped cards some time ago when
Linux was running on bare metal, we had problems. Perhaps we did not
vary off the channel on the linux lpar before we swapped the cards?
Linux on 390 Port <[email protected]> wrote on 18.02.2006 02:45:22:
I would vary the paths offline, swap the card, and vary the paths online.
May
not be necessary but it might. No need to do anything to the linux
guests,
that's what VM is for.
[EMAIL PROTECTED] wrote:
We have a problem in our disk array. One of the ficon channel
controller
cards is down. Our ops wants to swap it today. This will require
downing
3 channel paths out of 6 that are shared to z/VM.
In the past, I have always shutdown all Linux instances and z/VM and
brought it back after the card swap.
If three out of the six are suddenly unavailable, would z/VM ignore
them
and use the only three that are available? When all the six are
available when both cards are functioning, will z/VM auto-detect and
use
the channels?
Would this all be transparent to the Linux guests?
Apparently this is not an issue on the z/OS side.
--
__________________
Ranga Nathan
Work: 714-442-7591
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Mit freundlichem Gruß / Best regards,
Ingo Adlung
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