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HP File System Extender (FSE) manual Export HSMPTDIRECT=no, Export HSMBEAVERIFYPOSITION=ALWAYS

Models: File System Extender (FSE)

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To use buffered SCSI pass-through mode, uncomment the following line in trace.cfg, or add it if necessary:

export HSM_PT_DIRECT=no

HSM_BEA_VERIFY_POSITION

This debugging variable cannot be used with the fsesystem --enable-dbgcommand. It can only be specified in the trace.cfg file or used as environment variable.

The variable enables tape medium position check functionality of the Back End Agent (BEA). This BEA feature decreases the probability of data loss in SCSI bus reset events. Such events are not reported to the FSE system in certain cases and cannot be handled appropriately.

If you configure tape medium position check, BEA can check the position of an FSE tape medium during write operations. By default, these checks are not performed. To enable or disable position checks for all supported media families, set the HSM_BEA_VERIFY_POSITION environment variable to one of the following:

•NEVER

This value disables tape medium position checks. The consequences of setting this value are improved performance of tape write operations at the expense of reliability.

•ALWAYS

This value enables tape medium position checks for all supported media families.

Example

export HSM_BEA_VERIFY_POSITION=ALWAYS

HSM_LA_SERIAL_UNLOAD

This variable makes unloads from drives to library slots serialized. By default the unloads (medium ejects) are made in parallel.

Example

export HSM_LA_SERIAL_UNLOAD=yes

HSM_FRI_SAFETYBUF_TAPE

When migrating data, BEA checks for free space on tape to be able to copy the FRI file to the end of medium. Since the drives only estimate the free space, there should be a safety buffer. This ensures that FRI fits into the available space.

For LTO Ultrium and LTO Ultrium WORM media families, the suggested buffer size is 800 MB.

NOTE: The value is set in megabytes (only numeric characters are allowed).

Example

export HSM_FRI_SAFETYBUF_TAPE=1000

HSM_BEA_VERIFY_HEADER

Media header checks drop the performance of the LTO drives significantly. This variable enables the looser verification of IDs in the volume header for tape media that do not have medium cartridge memory at the time of migration. The IDs are verified only when the medium is exchanged.

The default value is “yes” or “true“. If this variable is set to "no" or "false" then the IDs in the header are verified only if any one of the following conditions is met:

•The medium was loaded by the job.

•Any of the drive IDs was changed (vendor ID, product ID, serial number).

•A medium change notification was reported by the SCSI subsystem.

280 Troubleshooting

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HP File System Extender (FSE) Export HSMPTDIRECT=no, Export HSMBEAVERIFYPOSITION=ALWAYS, Export HSMLASERIALUNLOAD=yes
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File System Extender (FSE) specifications

HP File System Extender (FSE) is a sophisticated solution designed to optimize data storage management for enterprises that deal with large volumes of unstructured data. This technology addresses the challenges of data growth and the need for effective data retention strategies, enabling organizations to store and manage their information more efficiently.

One of the main features of HP FSE is its ability to intelligently migrate data between primary and secondary storage. By utilizing policies that determine when to move infrequently accessed files to lower-cost storage environments, FSE helps reduce the strain on primary storage systems and saves on costs associated with high-performance storage solutions. This tiered approach to data management ensures that organizations can access the data they need quickly while still maintaining an efficient overall storage architecture.

Another notable characteristic of HP FSE is its seamless integration with existing storage infrastructures. The solution works with a variety of storage systems, allowing organizations to utilize their current investments without the need for significant changes to their infrastructure. This interoperability is powered by advanced technologies that facilitate data migration and retrieval, ensuring a smooth transition for organizations looking to optimize their storage strategies.

Additionally, HP FSE is equipped with robust reporting and analytics capabilities. This functionality provides organizations with insights into their storage usage, helping them understand data patterns and optimize their storage environments accordingly. By having visibility into which files are accessed most frequently and which are rarely used, organizations can make informed decisions on data retention policies and storage management.

Security is paramount in data management, and HP FSE addresses this concern by implementing advanced data protection features. This includes data encryption, secure access controls, and compliance with industry regulations, ensuring that sensitive information is safeguarded throughout its lifecycle.

Overall, HP File System Extender is a comprehensive data storage solution that combines intelligent data management, seamless integration, insightful analytics, and robust security features. By leveraging these capabilities, organizations can efficiently manage their unstructured data, lower costs, and enhance operational efficiency, making it an invaluable tool in today’s data-driven landscape.