Release Notes

Known issues
Topics:
• 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
The name of the NVMe device may change when it is
hot-inserted after a surprise removal
Description:
If an NVMe device is hot inserted after it was previously surprise removed when I/O operations are
accessing the device, the name of the NVMe device may change or will not retain the same name that is
assigned prior to surprise removal. Dmesg displays the following messages:
kernel: nvme nvme3: failed to mark controller CONNECTING
kernel: nvme nvme3: Removing after probe failure status: -16
The functionality of the NVMe device is not affected.
Applies to: Ubuntu 20.04.01
Systems
affected:
Dell EMC PowerEdge R740XD, Dell EMC PowerEdge R740XD2 Dell EMC PowerEdge R7525.
Tracking number: 181799
NVMe devices are enumerated in namespace 2 when
hot-inserted into the server after being surprise
removed
Description:
When an NVMe device from a RAID 1 MD array is hot-inserted after being surprise removed, the device is
enumerated in namespace 2 although only one namespace is enabled. The device is named as nvme2n2
instead of nvme2n1. This issue is observed on Dell Express Flash PM1725a device. The functionality of the
NVMe device is not affected.
Applies to: Ubuntu 20.04.01
Workaround: Pass the multipath=N module parameter to the nvme_core driver.
Systems
affected:
Dell EMC PowerEdge R740XD, Dell EMC PowerEdge R740XD2 Dell EMC PowerEdge R7525.
Tracking number: 181814
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8 Known issues