Command Reference Guide

2.12 NAME 84
2.12 NAME
fserecover – Recover a File System Catalog from its redundant duplicate data
sources. Recover an HSM file system from existing Name Space Catalog.
2.12.1 SYNOPSIS
fserecover {–f | – –fsc} PartitionName
fserecover {–i | – –hsmfs} PartitionName
fserecover {–h | – –help}
fserecover {–v | – –version}
2.12.2 DESCRIPTION
fserecover is used for regenerating:
• a File System Catalog (FSC) for the specified FSE partition in situations
when it is inconsistent, damaged or missing.
• an HSM file system (HSM FS) for the specified FSE partition in situations
when it is inconsistent, damaged or missing.
FSC RECOVERY PROCEDURE A File System Catalog is regenerated either
from the Fast Recovery Information (FRI) blocks, if they are present, or from
the migrated metadata. For safety reasons, FRI blocks have multiple copies on
different levels of FSE storage hierarchy. Their locations are the temporary files
on disk, system volume on FSE media and end part of each data volume on FSE
media.
The regeneration procedure always tries to choose the fastest recovery method and
achieve the shortest recovery time. It starts with searching for FRI in the following
order:
1. on disk (the fastest method),
2. on system volume on FSE media (fast method),
File System Extender 3.2 Command Line Reference