Release Notes
Table Of Contents
- Ubuntu Server 20.04 LTS for Dell EMC PowerEdge Servers Release Notes
- Contents
- Release summary
- Compatibility
- New and enhanced in this release
- Important notes
- Known issues
- A bus fatal error is detected on BCM57XX card
- Intel E810 and X710-T4L(device id 0x15ff) network cards are not detected after Ubuntu 20.04 is installed
- Ubuntu deployment through MaaS fails with Broadcom network cards BCM57xx
- The name of the NVMe device may change when it is hot-inserted after a surprise removal
- NVMe devices are enumerated in namespace 2 when hot-inserted into the server after being surprise removed
- /proc/mdstat and mdadm -D commands display incorrect statuses when two NVMe devices are surprise removed from a RAID 5 MD array
- Status of the RAID 0 LV is displayed as Available when one of the members of the RAID array is surprise removed
- BIOS Dell Update Packages (DUPs) will not run on Ubuntu 20.04
- Ubuntu Server 20.04 live image installation fails due to a loss of network connectivity
- CCP initialization failed error encountered after Ubuntu.20.04 is installed
- NVMe drive is not detected after multiple hot plug operations
- Limitations
- Updating Ubuntu
- Resources and support
- Contacting Dell EMC
/proc/mdstat and mdadm -D commands display
incorrect statuses when two NVMe devices are
surprise removed from a RAID 5 MD array
Description: When two of three NVMe devices are surprise removed from a RAID 5 MD array, the command cat/
proc/mdstat displays the array status incorrectly as active. Similarly, when the status of the MD
RAID is queried using the mdadm -D /dev/mdNcommand, the number of active and working
devices displayed is two. Only the status of the array reported is incorrect. However, when I/O operations
are performed, I/O errors are observed as expected.
Applies to: Ubuntu 20.04.01
Cause: When the number of devices that are surprise removed exceeds the number of devices that are required
for the array to function, the MD status is not updated.
Systems
affected:
All Dell EMC PowerEdge systems
Tracking number: 182820
Status of the RAID 0 LV is displayed as Available when
one of the members of the RAID array is surprise
removed
Description:
When Logical Volume Manager (LVM) is used to create a RAID 0 array and a member of the RAID array is
surprise removed, the lvdisplay command shows the LV status as Available.
Applies to: Ubuntu 20.04.01
Solution: Use the command lvs -o +lv_health_status to check the status of the RAID array. The command
displays the output Partial when a member of the RAID array is removed.
Systems
affected:
All Dell EMC PowerEdge systems
Tracking number: 175865
BIOS Dell Update Packages (DUPs) will not run on
Ubuntu 20.04
Description
When the operating system DUP method is used to update the system BIOS, the firmware update fails to
run on Dell EMC PowerEdge R240, R340, T140, T340 severs.
Cause This issue is specific to Intel Mehlow platforms where the Intel MEI driver is causing the firmware update
from running.
Workaround Perform the firmware updates through iDRAC or Lifecycle Controller (LC). Excluding the Intel MEI and
mei_me drivers allows the BIOS DUP to function.
Systems affected Dell EMC PowerEdge R240, R340, T140, T340 severs.
Applies to Ubuntu 20.04
Tracking number 178459
10 Known issues