Hi Antonis,
you are right. The NVMe drives can be assigned as you described. Of course one backplane would be considered as potential SPOF in your design.
As far as I know you can decide to add one more backplane and split NVMe modules to each backplane like in this configuration:
----eConfig output----
EJ1X Storage backplane with four NVMe U.2 drive slots = 2 EC7T 800GB Mainstream NVMe U.2 SSD 4k for AIX/Linux =4
--------
Look at the Redbook:
https://www.redbooks.ibm.com/redpapers/pdfs/redp5675.pdf page 126 where you can see Internal storage details and table with information features summary. Hope it is helpful for you.
PS: I can't remember that we would have any incident on P9 machines with NVMe backplane. I can see that backplanes line "PCIe lines extension and splitter" with some very simple ASIC and few cables/connectors...
------------------------------
JAN SUCHÝ
------------------------------
Original Message:
Sent: Thu November 24, 2022 02:05 AM
From: Antonis Constantinou
Subject: S1022s Dual VIOS
Dear all
Just a quick a question. On the new S1022s , S1022 and S1024 we can have Dual VIOS with single backplane and single NVME JBOF controller assigning two disks to one VIOS and the other two to the other? I understand that the backplane and adapter are single point of failure.
Regards
Antonis C
------------------------------
Antonis Constantinou
------------------------------