Simple OSA-Express question.....

2006-06-14 Thread Michael Schmutzok
For redundancy's sake, we are purchasing another OSA-Express card soon.
The issue is that we only have one free ESCON channel available and the
OSA card requires two (one for each port). The manuals seem to assume
that you're going to define the pair at the same time. My question is,
can I just define one port and leave the other port undefined until such
time as another channel frees up?

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Re: Simple OSA-Express question.....

2006-06-14 Thread R.S.

Michael Schmutzok wrote:


For redundancy's sake, we are purchasing another OSA-Express card soon.
The issue is that we only have one free ESCON channel available and the
OSA card requires two (one for each port). The manuals seem to assume
that you're going to define the pair at the same time. My question is,
can I just define one port and leave the other port undefined until such
time as another channel frees up?


Yes, you can define only one OSA chpid, not two.

However, I don't understand what does it mean 'ESCON channel available'.
Do you mean free ESCON port or free CHPID ?
ESCON port is totally unrelated. You can have free ports, or no.
Free chpid number means, you have many channels: close to 256 CHPIDs.
In that case it is related to new OSA.

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Radoslaw Skorupka
Lodz, Poland

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Re: Simple OSA-Express question.....

2006-06-14 Thread Doyle Banks
Hi,

Arturo is correct that you can define one or both of the OSA ports that you
will get with the new OSA card. You will need to find out what PCHIDs
will be assigned to those ports so that you can correctly define them with
the CHPIDs. You should be able to get the PCHID numbers from your SSR or
sales rep.

Also, do you mean that you have one ESCON channel (CHPID) remaining or did
you mean that there is one slot remaining which is where the new OSA card
will be placed? ESCON and OSA are two separate channel types and they come
on separate cards. The OSA card has two ports (or CHPIDs) per card. The
ESCON card has 16 ports per card (15 are useable, 1 is a spare).

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Re: Simple OSA-Express question.....

2006-06-14 Thread Michael Schmutzok
Ok, I feel stupid now (ok, more so than I usually do). I momentarily got
the channel ports confused with CHPID numbers. I'm not anywhere near the
256 CHPID limit so I've got plenty of those to choose from. Case closed
and thank you gentlemen for jogging my memory.  :o)

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