Troubleshooting ZFS Dump Device Issues
This section describes certain issues and possible resolutions related to dump devices.
-
The size of the dump device is too small.
When you reset the dump device, the output includes a message similar to the following:
dumpadm: dump device dump-path is too small to hold a system dump
To resolve this error, increase the size of the dump device. See Adjusting the Sizes of ZFS Swap and Dump Devices.
-
The dump device is disabled.
If necessary, create a new dump device and enable it by using the
dumpadm -d
command. See How to Create a Dump Volume. -
If the root pool is too small for the dump device, it can be added to a non-root pool as long as the pool is not a RAIDZ pool.
When you reset the dump device, the output includes a message similar to the following:
dump is not supported on device 'dump-path': 'pool' has multiple top level vdevs
Adding a dump device to pools with multiple top-level devices is not supported. Add the dump device to the root pool instead. Root pools support only a single top-level configuration.
-
A crash dump was not created automatically.
In this case, use the
savecore
command to save the crash dump.