Oracle VM: Troubleshooting 'Unable to mount file system "/dev/mapper/<uuid>": mount: you must specify the filesystem type\n' Error (Doc ID 2410964.1)

Last updated on SEPTEMBER 26, 2023

Applies to:

Goal

The error message 'Unable to mount file system "/dev/mapper/<uuid>": mount: you must specify the filesystem type\n' is typical seen when the Device Mapper device /dev/mapper/<uuid> is built as shared/local OCFS2 Repository, and the operation is to access this Repository, e.g. start up a VM guest with Virtual Disks on this Repository, or present an Oracle VM Server to this Repository.

For instance, an error while presenting this Repository to an Oracle VM Server:
OVMAPI_B000E Storage plugin command [storage_plugin_mount] failed for storage server [0004fa00000900004d5f3e593fa1fb14] failed with [com.oracle.ovm.mgr.api.exception.FailedOperationException: OVMAPI_4010E Attempt to send command: storage_plugin_mount to server: ovs1 failed. OVMAPI_4004E Sync command failed on server: 10.10.10.1. Command: storage_plugin_mount, Server error: <class 'OSCPlugin.OperationFailedEx'>:'Unable to mount file system "/dev/mapper/360fff15abd60b4cbe56fd56dd47c0c1a": mount: you must specify the filesystem type\n' [Wed Jun 13 15:40:48 CDT 2018]] OVMAPI_4010E Attempt to send command: storage_plugin_mount to server: ovs1 failed. OVMAPI_4004E Sync command failed on server: 10.10.10.1. Command: storage_plugin_mount, Server error: org.apache.xmlrpc.XmlRpcException: <class 'OSCPlugin.OperationFailedEx'>:'Unable to mount file system "/dev/mapper/360fff15abd60b4cbe56fd56dd47c0c1a": mount: you must specify the filesystem type\n' [Wed Jun 13 15:40:48 CDT 2018]

Solution

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