Technical Note: XTN1304
Introduction
To make each archival cartridge (e.g. an LTO cartridge) self contained, even when a file is deleted or renamed after the cartridge becomes nominally full, we have made a change from version 6.11 of XenData6 Server software to the way delete and rename operations are handled.
In versions prior to 6.11, the delete or rename record is written to the current writable archival volume which is not necessarily the archival volume to which the file was written. From version 6.11 of XenData6 Server these records are written to the archive volume that contains the last version of the file.
How Delete and Rename Records are Handled from Version 6.11
From version 6.11 of XenData6 Server software, changes have been implemented to ensure that each archival cartridge (e.g. an LTO cartridge) has a self contained set of files and folders. Consequently, delete and rename records are written to the cartridge on which the file being deleted or renamed was last written. The applicable cartridge(s) must be available for writing i.e. mounted in a standalone drive or library under XenData control. This applies to both TAR and LTFS formatted LTO cartridges and will apply to Optical Disc Archive (ODA) cartridges that will be supported in future releases.
If the cartridge on which the file was last written is offline, it will be impossible to rename or delete the file and a message will be written to the Windows Event Log stating that the required cartridge(s) is offline and giving the cartridge barcode(s). After the cartridge is made available near-line, you will be able to perform the rename or delete operation.
If the file is written to a replicated volume, then only one of the replica cartridges needs to be near-line for the delete or rename to be successful. In this case, the offline replica cartridge will be identified in the XenData Management Console as "Needs updating", and will be updated when it is put back into the library or inserted in a stand alone drive.
If a file that is fragmented and spans more than one cartridge is deleted or renamed, the delete or rename record will be written to all cartridges that contain that file.
Applicable Operating Systems
- Windows Server 2012 R2
- Windows Server 2016
- Windows Server 2019
Applicable XenData Software
This technical note is applicable to:
- Version 6 – Server Editions of Archive Series software
- Version 7 – Server Editions of Archive Series software including the Cloud File Gateway
PBS
XenData’s fully supported clustered server meets all the requirements for our disaster recovery site. We have been very pleased with the SX-525 product and XenData’s technical team who have provided system design and integration services above and beyond expectations.
James Cutright, Director, Project Management
PBS
Crew Cuts
I did my research, and the best archive solution was from XenData which manages a robotic LTO library behind the scenes. This helps to minimize our total costs and allows us to focus on producing great content for our customers.
Chris Keenan, CTO
Crew Cuts
Ideal Systems Singapore
We partnered with XenData for the GlobeCast Broadcast facility rollout, because it offers one of the most cost effective, robust digital video archives on the market and a great migration alternative to some of the more expensive digital video archive vendor offerings.
Fintan Mc Kiernan, CEO
Ideal Systems Singapore
North Shore Automation
Having completed over 25 joint installations of XenData archive systems, we have found everyone on the XenData team to be both highly professional and super responsive and their technology to be rock solid. They are truly a pleasure to work with.
Bryson Jones, Founder
North Shore Automation
This is Just a Test
With over 558 TB of content and growing, conventional backup solutions just don’t work for us. Our XenData system allows us to maintain an ongoing mirrored copy of our shared storage while creating replica LTO copies for offsite storage.
Nathan Flom
This is Just a Test
Excelencia
We have now installed over 170 XenData archive systems across Mexico and they have proven to be very reliable. In addition, the technical support from XenData has been outstanding.
Jorge Castaneda, President
Excelencia en Comunicaciones y Tecnología