MMFS_FSSTRUCT

This topic describes the MMFS_FSSTRUCT error log available in IBM Spectrum Scale™.

The MMFS_FSSTRUCT error log entry indicates that GPFS™ has detected a problem with the on-disk structure of the file system. The severity of these errors depends on the exact nature of the inconsistent data structure. If it is limited to a single file, EIO errors will be reported to the application and operation will continue. If the inconsistency affects vital metadata structures, operation will cease on this file system. These errors are often associated with an MMFS_SYSTEM_UNMOUNT error log entry and will probably occur on all nodes. If the error occurs on all nodes, some critical piece of the file system is inconsistent. This can occur as a result of a GPFS error or an error in the disk system.

If the file system is severely damaged, the best course of action is to follow the procedures in Additional information to collect for file system corruption or MMFS_FSSTRUCT errors, and then contact the IBM® Support Center.