Release Notes

Installing Red Hat Enterprise Linux 7 by using the
iDRAC Virtual Media does not resume if the iDRAC
network is set to the shared LOM mode
Description: When installing Red Hat Enterprise Linux 7 by using the iDRAC Virtual Media, where the iDRAC network
is set to Shared LOM mode, Red Hat Enterprise Linux 7 installer initiates a reset on the LAN on
Motherboard (LOM) devices.
Applies to: Red Hat Enterprise Linux 7
Cause: If Spanning Tree is enabled on the switch, there could be a delay in the switch port forwarding network
traffic. This delay results in loss of connection to iDRAC or Virtual Media and the installation stops. After
sometime the connectivity is restored but the installer but the installation does not resume.This is an
expected behavior from the installer.
Workaround: Disable Spanning Tree Protocol (STP) or set PortFast on the uplink port to the iDRAC, during the
Virtual Media installation.
Kernel panic occurs when OMSA services are started
on Red Hat Enterprise Linux 7
Description:
Kernel panic occurs when OpenManage Server Administrator (OMSA) services are started on Red Hat
Enterprise Linux 7.
Applies to: Red Hat Enterprise Linux 7.0
Cause: The Kernel might spend more time in servicing the kernel timer functions and set a flag to prevent the
other code from resetting the timer hardware (APIC timer). Then it programs the timer hardware for a
timeout up to 100 milliseconds to run the kernel timer functions. At the next timer hardware interrupt,
this flag is cleared. However, there is a bug in the kernel where this flag can be ignored in one specific
code path. When this happens, the timer hardware can be set to the wrong timeout value. This incorrect
timeout value can be over 10 seconds during this time no kernel timer function runs.
Workaround: Update the kernel to Z-stream kernel.
When Virtual Disk is not initialized, Red Hat
Enterprise Linux 7 cannot be installed on 4k sector
hard drives
Description:
While installing Red Hat Enterprise Linux 7, on RAID 0 volume created on 4K sector hard drive, it displays
the message setting up the installation environment and an unknown error.
Applies to: Red Hat Enterprise Linux 7.0
Cause: Calculating the time required to delete the GUID partition table (GPT) magic number is incorrect for 4k
sector hard drives.
Workaround: Initialize VD and install the Red Hat Enterprise Linux 7.
42 Known issues