Thanks Radoslaw, that's all I needed to know (to fill this gap in my 
understanding of OSD setup).

– Vignesh
Mainframe Infrastructure

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf 
Of R.S.
Sent: 15 June 2018 12:24
To: [email protected]
Subject: [EXTERNAL] Re: OSA/SF HCD question

W dniu 2018-06-15 o 11:05, Sankaranarayanan, Vignesh pisze:
> Hello All,
>
> In a 2 port per CHPID card (4 ports in a card), to use OSA/SF, is 1 OSAD unit 
> required per port (for a total of 4), or is 1 OSAD unit enough per CHPID/PCH 
> (for a total of 2).

You need 1 OSAD per CHPID, in other words 1 OSAD per two ports.

Caution: you wrote about 2 CHPID per card. It is NOT true for many years, that 
means OSA-Express6s, 5s and 4s have 1 CHPID per card.
The last card with two CHPIDs per card was OSA-Express3, the long one, for 
older I/O Cage or I/O Drawer. It was standard feature of z196, newer machines 
could use it as Carry Forward only.

--
Radoslaw Skorupka
Lodz, Poland




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