HP File System Extender (FSE) fse –, fse –, Note:, –start, –status, fsepool, 2.11 NAME, fsebackup, fsebackup, fsebackup, fserestore, MEDIA POOL TYPES

2.11 NAME 89

Each FSE command communicates with the FSE processes through the Management Interface (fse–mif). To execute an FSE command, the Management Interface must be running. If the connection to the Management Interface fails, check its status by running the fse – –statuscommand. In case the Management Interface is not running, start it with the fse – –startcommand.

After a successful command execution fsepool notifies the FSE administrator with a suitable message, which is printed to the standard output stream (stdout). If there was an error during the command execution, an appropriate error message is printed to the standard error stream (stderr).

MEDIA POOL TYPES There are three FSE media pool types that can be spec- ified when configuring a new FSE media pool: regular, WORM and backup.

Regular FSE media pool is used for storing data, which is migrated from an HSM file system. FSE media that belong to this type of media pool can be overwritten, reorganized, re–initialized and re–formatted.

WORM FSE media pool differs from a regular FSE media pool in one important characteristic: it is impossible to overwrite data on the media that belong to this kind of media pool. Such media are called WORM media. Data that had already been migrated to a WORM medium cannot be overwritten, it can only be appended to. A WORM medium cannot be reorganized, re–initialized or re–formatted. WORM FSE media pool type is therefore suitable for storing permanent archives and for other similar purposes.

Backup FSE media pool is essentially different from the other two FSE media pool types. FSE media in this type of media pool do not store user data migrated from an HSM file system; they hold backup copies of the FSE server state created by the fsebackup command. To be able to backup and restore the FSE server, there must be a backup FSE media pool configured, to allow backup FSE media allocation by the fsebackup and fserestore commands. A backup pool should be configured with only one volume. Backup media in this pool must be initialized. For details about FSE backup, see the fsebackup man page.

Note:

There can be only one backup FSE media pool configured in an FSE imple- mentation.

HP StorageWorks File System Extender Software CLI reference