Applies To

• Linux
• ndctl utility

Issue

Creating a new namespace using ’ndctl create-namespace’, may return the following error:

# ndctl create-namespace -r region0
failed to create namespace: Resource temporarily unavailable

Cause

There are many potential causes including:

• There’s no available capacity within the region because one or more namespaces exist and have consumed all the space.
• The region is disabled.
• There’s an issue with the labels for the NVDIMMs belonging to the region.

Solution

Use the -v option to print more information to help identify the cause. A debug version of ndctl may be required to get useful information. See Installing NDCTL for instructions to build ndctl with debug options from source code.

For a scenario where there’s no space left within the region, a message similar to the following will be shown:

# ndctl create-namespace -r region0 -v
...
namespace_create:772: region0: insufficient capacity size: 0 avail: 0
failed to create namespace: Resource temporarily unavailable

When a region is disabled, the following will be shown:

# ndctl create-namespace -r region0 -v
...
validate_namespace_options:473: region0: disabled, skipping...
failed to create namespace: Resource temporarily unavailable

Identifying label issues requires more investigation. Start with Validating Labels.

The Resource temporarily unavailable message improvements is resolved in ndctl v66 or later. See https://github.com/pmem/ndctl/issues/67