Aborting FSE restore

CAUTION: HP strongly dissuades aborting the restore process in which actual restore of the FSE server is performed. If this happens, the FSE server may remain only partially restored, with inconsistencies in the entities that were backed up, which results in an incorrect FSE operation or no operation at all. Such circumstances may more than likely lead to a major data loss in the FSE implementation.

Nevertheless, if the above happened, you are advised to contact HP technical support.

To abort an ongoing FSE restore process, you need to abort the fserestore command. Perform the step:

1.In the window where fserestore was invoked, press CTRL+C.

Post-restore steps

After the restore process is complete, on each host of the FSE implementation, run the following command to start local FSE processes. Note that processes must be started on the consolidated FSE system or FSE server first:

fse --start

Recovery

Besides the FSE backup and restore feature that covers only FSE server, FSE provides functionality for recovering from disasters that may occur on other hosts of the FSE implementation. This functionality is called FSE recovery. If internal or external FSE client is left with a damaged or destroyed HSM file system, FSE recovery should be considered as the supplement to the conventional FSE restore process. The advantage of FSE recovery over FSE backup and restore is that it does not depend on the availability of FSE backup images.

FSE recovery can resolve the following problems:

•damaged or missing File System Catalog (FSC)

In such circumstances, File System Catalog recovery recreates FSC files on the FSE server from the Fast Recovery Information (FRI) data and the data migrated to FSE media. The result of this process is File System Catalog that is consistent with metadata on the associated FSE media.

•damaged HSM file system

In such circumstances, HSM file system recovery recreates damaged HSM file system from the belonging Name Space Catalog, which is part of the File System Catalog. This recovery method can also be used in less severe situations, for example, when contents of HSM file system are inconsistent with entries in the corresponding FSC.

For the recommended ways of combining FSE backup and restore with FSE recovery, see section ”Defining your backup strategy” on page 219.

File System Catalog recovery

The File System Catalog is recreated either from Fast Recovery Information (FRI), if it is available, or from the migrated metadata.

NOTE: During an FSC recovery, media reorganization is inhibited.

Note that the results of a previously implemented reorganization scan are invalidated by an FSC recovery.

The File System Catalog recovery procedure

To perform FSC recovery, proceed as follows:

1.Disable the problematic FSE partition.

2.Remove the FSC directory that belongs to the FSE partition.

HP StorageWorks File System Extender Software user guide 235