Dynamic validation of descriptors on disk
IBM Storage Scale can periodically scan descriptors on disk to detect and fix corruption early rather than waiting until the next remount.
The first time a file system gets mounted, a periodic validation of the nsd, disk, and stripe group descriptors gets started. This validation occurs, by default, every 5 seconds. The nsd, disk, and stripe group descriptors are read and compared with the corresponding descriptors in memory or cache. If a mismatch occurs, that information is logged and, if appropriate, the file system gets panicked. The recovery steps to fix corrupted data from cache are also logged.