Release Notes

Known issues
Topics:
• /proc/mdstat and mdadm -D commands display incorrect statuses when two NVMe devices are surprise removed from a
RAID 5 MD array
• MD RAID layer is not notified of the surprise removal of Samsung NVMe devices
• Unable to shut down SLES when the graceful shutdown option from iDRAC is selected or when power button is pressed on
the server
/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:
SUSE Linux Enterprise Server 15 Service Pack 2
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
MD RAID layer is not notified of the surprise removal
of Samsung NVMe devices
Description:
When a virtual disk is created on the MD RAID layer using a Samsung NVMe device, the MD RAID layer is
not notified of the surprise removal of the NVMe drive. The output of the mdadm -D command displays
an incorrect status of the MD RAID virtual disk (VD). The issue is observed on Dell Express Flash
PM1725a, PM1725b, Enterprise NVMe Agnostic (AGN) devices. The array status reporting is incorrect.
When I/O operations are performed, I/O errors are observed as expected and the file-system changes to
read-only.
Applies to:
SUSE Linux Enterprise Server 15 Service Pack 2
Cause: The issue is related to handling devices which showcase multipath capability.
Workaround: Pass the multipath=N parameter to the nvme_core driver module.
Systems
affected:
All Dell EMC PowerEdge systems with support for NVMe surprise removal feature
Tracking number: 175555
5
Known issues 17