User's Manual

10 Introducing HP StorageWorks File System Extender
enables multiple copying of migrated files, thus satisfying the need for additional backup copies and
avoiding recall failures.
Library - tape compatibility
FSE software is a part of HP StorageWorks File System Extender, and can be used with supported SCSI
tape libraries with supported drive types.
FSE software supports LTO drive technologies for LTO Ultrium 1, LTO Ultrium 2, and LTO Ultrium 3 media.
LTO Ultrium 3 WORM media are supported where a WORM type tape media is required.
With LTO drives and media, FSE software also supports special memory chips, called Medium Auxiliary
Memory (MAM), which are integrated in the LTO Ultrium tape cartridges and enable LTO Ultrium drives to
locate files much faster.
For a list of the supported tape libraries, tape drives, and tape media, see the latest support matrices.
Automatic error detection
FSE automatically detects drive and media hardware errors. When FSE detects such errors, the following
happens:
• The drive status is set to error.
• If an error occurs during a migration job, the medium status is set to unreliable, which disables
further writing to it.
• If an error occurs during a recall job, the medium status is set to unusable, which disables reading
from and writing to it. Neither the drive nor the medium in it are used for the operation until the
administrator appropriately changes the drive and medium statuses. For more information, see
”Changing the condition status of media” on page 119.
In each of the above cases, an appropriate entry is written to the FSE event log. If you find an FSE medium
marked unreliable or unusable, the FSE event log and FSE error log need to be searched backwards
to identify the root cause of the problem.
For more information about FSE log files, see chapter ”Monitoring and maintaining FSE”, section ”FSE log
files” on page 196.
Automatic detection of low storage space
If the HSM Health Monitor (HHM) utility is installed and configured, FSE can automatically detect low
storage space related conditions such as:
• low disk space on file systems with FSE databases and system files
• low disk space on HSM file systems
• low secondary storage space
If any of the above conditions occurs, an e-mail can be sent and a configurable action can be triggered.
Likewise, when the condition is not present anymore, an e-mail can also be sent and a configurable action
can be triggered.
Typical actions that may be triggered involve putting the monitored HSM file systems into Limited Access
Mode, notifying the FSE users, shutting down the FSE system in case of unrecoverable situations, or putting
the monitored HSM file system online again in case the condition is no longer present.
For more information on automatic low storage detection, see chapter ”Monitoring and maintaining FSE”,
section ”Low storage space detection” on page 186.
NFS and CIFS support
Remote Linux and Windows clients access HSM file systems using standard protocols. Network File System
(NFS) is the standard protocol for UNIX and Linux platforms. Common Internet File System (CIFS) is the
standard protocol for Windows platform.
Linux FSE system specific
FSE supports access to FSE partitions from remote locations via NFS and CIFS protocols.