Flashes (Alerts)
Abstract
If you perform a Non-Volatile Memory (NVM) subsystem reset operation, then the logical partition (LPAR) loses connectivity to the Non-Volatile Memory Express (NVMe) disk. As a result, the NVMe disk cannot be accessed for input or output (I/O) operations or admin commands.
Content
Linux Releases Affected
Red Hat Enterprise Linux (RHEL) 8.x
RHEL 9.x
SUSE Linux Enterprise Server (SLES) 15.x
IBM Systems Affected
IBM POWER9 and Power10 systems with NVMe disks
Symptoms
The NVMe disk cannot be accessed for I/O operations or admin commands, as the LPAR loses connectivity to the NVMe disk when a NVM subsystem reset operation is performed.
Workaround
The connectivity to the NVMe disk can be restored by using one of the following methods:
- Reboot the LPAR.
- To hotplug the NVMe disk by using the drmgr command, enter the following commands:
# echo | drmgr -r -c pci -s <nvme-slot-location-code> # echo | drmgr -a -c pci -s <nvme-slot-location-code>where <nvme-slot-location-code> is the respective NVMe disk slot number.
Fix Outlook
The proposed fix to resolve this issue is submitted upstream and is currently being discussed with
the upstream developer.
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Document Information
Modified date:
07 May 2024
UID
ibm17149797