Dell PowerEdge Systems Running Red Hat Enterprise Linux 7

Dell PowerEdge Systems Running Red Hat
Enterprise Linux 7
Release Notes
Notes, Cautions, and Warnings
NOTE: A NOTE indicates important information that helps you make better use of your computer.
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you
how to avoid the problem.
WARNING: A WARNING indicates a potential for property damage, personal injury, or death.
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jurisdictions. All other marks and names mentioned herein may be trademarks of their respective companies.
2014 - 12
Rev. A02
Contents
1 Overview................................................................................................................. 5
System configuration requirements..................................................................................................... 5
Memory............................................................................................................................................ 5
Installation and upgrade instructions................................................................................................... 5
2 Issues and Resolutions.........................................................................................6
Unable to restart Red Hat Enterprise Linux 7 after the successful installation on iSCSI LUN............ 6
Red Hat Enterprise Linux 7 might not boot in the UEFI mode............................................................ 6
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.................................................................................. 6
Unable to shutdown the Red Hat Enterprise Linux 7 when you select the Graceful shutdown
option or when you press the power button on the system...............................................................7
Kernel panic occurs when OMSA services are started on Red Hat Enterprise Linux 7.......................7
When Virtual Disk (VD) is not initialized, Red Hat Enterprise Linux 7 cannot be installed on 4k
sector hard drives.................................................................................................................................. 7
Invalid naming conventions for the ports of Emulex OneConnect OCe14102-UX-D card
when NPAR-EP is enabled.................................................................................................................... 8
Unable to move soft link .desktop file.................................................................................................. 8
Unable to boot Red Hat Enterprise Linux 7, when the Execute Disable option is disabled............... 8
Unable to install Red Hat Enterprise Linux 7 in the UEFI mode...........................................................8
While adding second slave to bond, it asks for connection type and shows additional
connection types...................................................................................................................................9
Loopback device is displayed as unknown in network settings..........................................................9
Kernel panic on reboot or shutdown when Mellanox Team is setup................................................. 9
PCIeSSDs reports incorrect pciehp messages during boot................................................................ 9
VMM does not displays Windows Server 2012 in drop-down list..................................................... 10
Ethtool link test fails in Offline mode despite the cable being connected to the port.................... 10
PXE boot fails with a system crash when Red Hat Enterprise Linux 7 is installed on local
storage and the tftp server has an invalid boot EFI file......................................................................10
NVMe driver reports I/O error on Surprise Removal or Surprise Insertion........................................11
Reading EEPROM from a Broadcom device via ethtool results in soft lockup................................. 11
Error during the first boot on iSCSI disk..............................................................................................11
Enabling SR-IOV virtual functions on both Intel and Mellanox cards result in invalid naming
conventions for the network devices................................................................................................. 12
Mellanox card does not display supported link modes as 40G.........................................................12
Unable to install Red Hat Enterprise Linux 7 on a drive with an existing btrfs partition................... 12
syslog displays error Related to network.service .............................................................................. 12
Unable to move the OpenManage Server Administrator icon anywhere on the desktop............... 13
ras-mc-ctl command displays DIMM labels related error message................................................. 13
3 Getting Help........................................................................................................ 14
Contacting Dell....................................................................................................................................14
Related documentation.......................................................................................................................14
Documentation Feedback...................................................................................................................14
1
Overview
Red Hat Enterprise Linux 7 is available on the following architectures:
•
64-bit AMD
•
64-bit Intel
System configuration requirements
For detailed system configuration requirements of this version of Red Hat Enterprise Linux, see the
documentation at redhat.com/support.
Memory
The following table lists the system memory requirements for the x86_64 architecture of Red Hat
Enterprise Linux 7.
Table 1. Memory Requirements for x86_64 Architecture
Memory
Size
Minimum recommended system memory
1 GB per logical CPU
Maximum certified system memory
6 TB
Installation and upgrade instructions
For information on installing or upgrading from a previous version of Red Hat Enterprise Linux 7, see
Installation Instructions and Important Information at dell.com/operatingsystemmanuals.
5
Issues and Resolutions
2
Unable to restart Red Hat Enterprise Linux 7 after the
successful installation on iSCSI LUN
Description:
Unable to restart Red Hat Enterprise Linux 7 after the successful installation on
iSCSI LUN, when the iSCSI adapter network settings are set to Static IP.
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
During the restart, the system does not recognize the target static IP.
Workaround:
Restart the system by using iSCSI with client IP address to /boot/grub2/
grub.cfg.
Red Hat Enterprise Linux 7 might not boot in the UEFI
mode
Description:
After booting Red Hat Enterprise Linux 7 from the hard drive in the UEFI mode, if
you enter C to go to the grub command line, and then enter exit, the system
automatically restarts and displays the Red Screen of Death (RSOD).
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
Grub2 bootloader exits before the system services complete running.
Workaround:
Press Esc to exit from grub command line.
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 7.0
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.
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Workaround:
Disable Spanning Tree Protocol (STP) or set PortFast on the uplink port to the
iDRAC, during the Virtual Media installation.
Unable to shutdown the Red Hat Enterprise Linux 7 when
you select the Graceful shutdown option or when you
press the power button on the system
Description:
When you select the Graceful shutdown option from iDRAC or press the power
button, the system goes to a suspended state and all the tasks stop. The system
restarts to the login prompt on pressing any key.
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
By default the Power button action drop-down menu is mapped to the
Suspended state in the gnome-tweak-tool.
Workaround:
Select Shutdown from the Power button action drop-down menu.
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 ms 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
functions will be run.
Workaround:
Update the kernel to Z-stream kernel.
When Virtual Disk (VD) 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.
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Workaround:
Initialize VD and install the Red Hat Enterprise Linux 7.
Invalid naming conventions for the ports of Emulex
OneConnect OCe14102-UX-D card when NPAR-EP is
enabled
Description:
Red Hat Enterprise Linux 7.0 with Emulex OneConnect OCe14102-UX-D card
naming conventions by biosdevname may not be accurate for all the networking
devices. As a result partitions 3 and 4 of all the four ports of Emulex is not named
as expected.
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
Biosdevname has the Limitation, which cannot handle more than 7 PCI functions.
Workaround:
Add kernel boot parameter “biosdevname=0” this return back to ethN naming.
Unable to move soft link .desktop file
Description:
Unable to move soft link .desktop file with type=link.
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
Unable to deference the source of softlink.
Workaround:
Use soft link as hard link.
Unable to boot Red Hat Enterprise Linux 7, when the
Execute Disable option is disabled
Description:
Unable to boot Red Hat Enterprise Linux 7 in the UEFI mode, when the Execute
Disable option is disabled in the BIOS mode.
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
The pagelookup table is marked with NX flag so during the page execution the
page fault occurs.
Workaround:
Do not disable the Execute Disable option in BIOS or use default BIOS settings.
Unable to install Red Hat Enterprise Linux 7 in the UEFI
mode
Description:
During the installation of Red Hat Enterprise Linux 7, the Anaconda installer is
unable to create boot entry using EFIbootmgr, in the UEFI mode.
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
EFIbootmgr is unable to create a UEFI boot entry, when boot variables of Hard
drive C: (under BIOS) is greater than 1024 bytes. This is a known limitation.
8
Workaround:
1.
Remove all the bootable devices shown under Hard Drive C: (listed in BIOS
under F11 option).
2.
Boot into legacy BIOS, and change the boot setting to UEFI mode.
3.
Reboot the server, re insert the devices that we removed under Hard Drive
C: and reinstall.
While adding second slave to bond, it asks for connection
type and shows additional connection types
Description:
To create the bonding interference between the master and the slave, slave asks
for connection type and displays additional connection types.
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
Network manager does not filter the type of connection required for the slave.
Workaround:
This error can be ignored as there is no functionality loss.
Loopback device is displayed as unknown in network
settings
Description:
Network setting of local host displayed as unknown for loopback interface.
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
Network manager does not manage the loopback interface.
Workaround:
This error can be ignored as there is no functionality loss.
Kernel panic on reboot or shutdown when Mellanox
Team is setup
Description:
Rebooting the system results in kernel panic, when the system has a bonding
device with Mellanox ConnectX-3 devices as slaves.
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
Kernel panic occurs when Mlx4_ib driver accesses the slave data structure that is
already freed during the restart.
Workaround:
Ensure that Mlx4_ib driver is unloaded before reboot.
PCIeSSDs reports incorrect pciehp messages during boot
Description:
During Red Hat Enterprise Linux 7 bootup, pciehp related messages are displayed
even when there are no hotplug activity: “pciehp 0000:82:05.0:pcie24: Device
0000:84:00.0 already exists at”
9
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
While booting kernel attempts to add a pre-existing device prior moving to the
suspend state.
Workaround:
This error can be ignored as there is no functionality loss.
VMM does not displays Windows Server 2012 in dropdown list
Description:
Virtual Machine Manager (VMM) does not display Windows Server 2012 in the dropdown list of a new Virtual Machine window.
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
There is no entry created for Windows Server 2012 in the VMM.
Workaround:
There is no functionality loss. You can install Windows Server 2012 after selecting
any generic windows item from the drop-down list.
Ethtool link test fails in Offline mode despite the cable
being connected to the port
Description:
Ethtool link test fails in Offline mode despite the cable being connected to the port.
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
A PHY link require five seconds to enable the link.
Workaround:
There is no functionality loss.
PXE boot fails with a system crash when Red Hat
Enterprise Linux 7 is installed on local storage and the tftp
server has an invalid boot EFI file
Description:
When Red Hat Enterprise Linux 7.0 is installed on local storage and we try to boot
through PXE in UEFI mode, where the PXE setup has an invalid boot EFI file in tftp
server, it is expected to boot from Red Hat Enterprise Linux 7.0 on local storage,
however it fails with Red Screen of Death (RSOD).
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
Workaround:
10
1.
shim must load the grub from where the shim is loaded, currently there is no
check for this.
2.
RSOD occurs since there is no check against the pointer in the unhook system
services, which is responsible for loading the image.
Ensure that the valid boot EFI file is configured in the tftp server.
NVMe driver reports I/O error on Surprise Removal or
Surprise Insertion
Description:
NVMe driver reports multiple buffer I/O errors on surprise removal and surprise
insertion of a NVMe device and the following error message is displayed Buffer
I/O error on device nvme0n1, logical block 0.
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
Surprise Removal Surprise Insertion (SRSI) feature is not supported.
Workaround:
This error can be ignored as there is no functionality loss.
Reading EEPROM from a Broadcom device via ethtool
results in soft lockup
Description:
With Broadcom network adapters, reading EEPROM via ethtool –e<interface
name> results in CPU soft lock, when cable is not connected to the port.
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
When cable is not connected, the clock speed of the device becomes slow, based
on the power saving mode setting defined in NVRAM. Due to this, EEPROM reads
take a long time to complete and results in CPU soft lockup.
Workaround:
Ensure that cable is connected to the specific port before reading EEPROM on that
port.
Error during the first boot on iSCSI disk
Description:
When Red Hat Enterprise Linux 7.0 is installed on iSCSI disk from Broadcom 10G
network adapter, dmesg shows the following error message:
•
Failed to empty BRB.
•
Storm stats were not updated for three times.
•
Driver assert.
•
Begin crash/panic dump.
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
BRB is not cleared by the bnx2x driver during the iSCSI boot that was previously
used by the UNDI driver.
Workaround:
Reboot the system.
11
Enabling SR-IOV virtual functions on both Intel and
Mellanox cards result in invalid naming conventions for
the network devices
Description:
While rebooting, the naming conventions by biosdevname may not be accurate for
all the networking devices, when SR-IOV virtual functions are enabled by systemd
on both Intel and Mellanox devices at the same time.
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
The mlx4_core driver consumes more time for the probe of all the VFs, which
results in termination of biosdevname.
Workaround:
Enable SR-IOV on Intel using the sysfs method.
Mellanox card does not display supported link modes as
40G
Description:
The Mellanox 40G Network card does not display the supported link modes as
40G. Instead, it is displayed as 10G.
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
The Mellanox driver does not set the 40 GB bits in advertised and supported links.
Workaround:
This error can be ignored as there is no functionality loss.
Unable to install Red Hat Enterprise Linux 7 on a drive
with an existing btrfs partition
Description:
During Red Hat Enterprise Linux 7 installation after selecting a drive with existing
btrfs file system, the Anaconda installer is not able to delete the btrfs partitions.
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
The Anaconda installer is not able to delete the sub volumes of btrfs file systems.
Workaround:
Ensure that there are no existing brtfs partitions on the drive.
syslog displays error Related to network.service
Description:
12
syslog displays the following error messages indicating that network.service has
failed:
•
Failed to activate 'em1': Connection 'em1' is not available
on the device em1 at this time.
•
Connection activation failed: Connection 'em1' is not
available on the device em1 at this time.
•
Failed to start LSB: Bring up/down networking.
•
Unit network.service entered failed state.
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
In the network.service script, nmcli cannot get the network interface state
information for the first time. The retry is successful.
Workaround:
This error can be ignored as there is no functionality loss.
Unable to move the OpenManage Server Administrator
icon anywhere on the desktop
Description:
You are unable to move the OpenManage Server Administrator icon anywhere on
the desktop. Error while copying message is displayed.
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
Hard linked .desktop files do not have source files information populated
appropriately.
Workaround:
This error can be ignored as there is no functionality loss.
ras-mc-ctl command displays DIMM labels related error
message
Description:
When you run the command ras-mc-ctl --print-labels, the system displays the
error No dimm labels for Dell Inc.
Applies to:
Red Hat Enterprise Linux 7.0
Cause:
rasdaemon is unable to get the DIMMs details from the SQLite datebase. Also,
rasdaemo cannot guess the DIMMs label using the dmidecode for the new
memory controllers.
Workaround:
This error can be ignored as there is no functionality loss.
13
Getting Help
3
Contacting Dell
NOTE: Dell provides several online and telephone-based support and service options. If you do not
have an active Internet connection, you can find contact information on your purchase invoice,
packing slip, bill, or Dell product catalog. Availability varies by country and product, and some
services may not be available in your area.
To contact Dell for sales, technical support, or customer-service issues:
1.
Go to dell.com/contactdell.
2.
Select your country from the drop-down menu on the top left corner of the page.
3.
For customized support:
a. Enter your system service tag in the Enter your Service Tag field.
b. Click Submit.
The support page that lists the various support categories is displayed.
4.
For general support:
a. Select your product category.
b. Select your product segment.
c. Select your product.
The support page that lists the various support categories is displayed.
Related documentation
NOTE: For all PowerEdge and PowerVault documentation, go to dell.com/poweredgemanuals and
dell.com/powervaultmanuals. Enter the system Service Tag to get your system documentation.
NOTE: For information on deploying Red Hat Enterprise Virtualization, see the product
documentation available at docs.redhat.com.
You product documentation from Dell includes:
•
Installation Guide
•
Release Notes
Documentation Feedback
If you have feedback for this document, write to documentation_feedback@dell.com. Alternatively, you
can click on the Feedback link in any of the Dell documentation pages, fill out the form, and click Submit
to send your feedback.
14