documnen LSI MegaRAID SAS

rhel8/index.md

@@ -43,6 +43,32 @@ A lot works already out of the box, but no guarantee can be given unless your sp
 | `devtoolset*` | `gcc-toolset*` | |
 | `git-cvs` | - | `cvs` itself is not supported by RHEL8, but available through EPEL. Still missing is the support for `git cvsimport`. |
 
+### Boot Failure due to Missing RAID Drivers
+
+If the machine does not boot after provisioning with
+```
+Warning: /dev/mapper/vg_root-lv_root does not exist
+Warning: /dev/vg_root/lv_root does not exist
+```
+after a lot of
+```
+Warning: dracut-initqueue timeout - starting timeout scripts
+```
+the it could be that the RAID controller is not supported any more.
+There is a [full list](https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/considerations_in_adopting_rhel_8/hardware-enablement_considerations-in-adopting-rhel-8#removed-adapters_hardware-enablement) of such hardware, but e.g. for the LSI MegaRAID SAS there is a [dedicated article](https://access.redhat.com/solutions/3751841).
+
+For the LSI MegaRAID SAS there is still a driver available in ElRepo, so it can be installed during provisioning by Puppet.
+To do so add to Hiera:
+```
+base::pkg_group::....:
+  - 'kmod-megaraid_sas'
+
+rpm_repos::default:
+  - 'elrepo_rhel8'
+```
+
+
+
 ### No Gnome Screen Lock with NX Server
 On machines running NX Server Gnome does not provide a screen lock option.
 Still the screen can be locked running below command in the terminal:
@@ -81,6 +107,7 @@ which is IMHO OK to not allow a normal user to do changes there.
 
 * [Installation](installation)
 * [Package Management](packages)
+* [Kerberos](kerberos)
 * [Desktop](desktop)
 * [Vendor Documentation](vendor_documentation)