Merge pull request #100087 from lg-rh/abi_4.20_ibmz

[OCPBUGS-63013]IBMZ Docs changes for ABI 4.20 Release

Author: xenolinux

modules/adding-ibm-z-lpar-agent.adoc

@@ -39,14 +39,15 @@ random.trust_cpu=on rd.luks.options=discard
 +
 [NOTE]
 ====
-For FCP multipath configurations, provide two disks instead of one.
+For FCP multipath configurations, provide available multiple paths to the disk instead of a single path, and add `rd.multipath=default` to enable multipath during installation.
 ====
 +
 .Example 
 [source,yaml]
 ----
 rd.zfcp=<adapter1>,<wwpn1>,<lun1> \
-rd.zfcp=<adapter2>,<wwpn2>,<lun2>
+rd.zfcp=<adapter2>,<wwpn2>,<lun2> \
+rd.multipath=default
 ----
 +
 <4> To enable FIPS mode, specify `fips=1`. This entry is required in addition to setting the `fips` parameter to `true` in the `install-config.yaml` file.

modules/installing-ocp-agent-ibm-z-zvm.adoc

@@ -45,14 +45,15 @@ coreos.inst.persistent-kargs="console=tty1 console=ttyS1,115200n8"
 +
 [NOTE]
 ====
-For FCP multipath configurations, provide two disks instead of one.
+For FCP multipath configurations, provide available multiple paths to the disk instead of a single path, and add `rd.multipath=default` to enable multipath during installation.
 ====
 +
 .Example 
 [source,yaml]
 ----
 rd.zfcp=<adapter1>,<wwpn1>,<lun1> \
-rd.zfcp=<adapter2>,<wwpn2>,<lun2>
+rd.zfcp=<adapter2>,<wwpn2>,<lun2> \
+rd.multipath=default
 ----
 <6> To enable FIPS mode, specify `fips=1`. This entry is required in addition to setting the `fips` parameter to `true` in the `install-config.yaml` file.
 --

modules/understanding-agent-install.adoc

@@ -79,3 +79,8 @@ For platform `none`:
 
 * Review the information in the link:https://access.redhat.com/articles/4207611[guidelines for deploying {product-title} on non-tested platforms] before you attempt to install an {product-title} cluster in virtualized or cloud environments.
 ====
++
+[NOTE]
+====
+For installations on {ibm-z-name} (`s390x`) architecture, the minimum memory requirement is 24 GB RAM per host instead of 16 GB.
+====