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File versus Block Backup
SUMMARY File versus Block Backup ISSUE Purpose What is meant by block level backup? Does Unitrends use File or Block-based backups? Description What is meant by block level backup? Does Unitrends use File or Block-based backups? For example, if a change is made to a file do we replicate the change blocks only or whole…
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How do I delete a client from the Unitrends system?
SUMMARY Explains how to delete a client. ISSUE RESOLUTION Whether you use the old Legacy recoveryconsole or the new HTML5 ui, you must have the following completed BEFORE you attempt to delete a Protected Asset/Client: * Remove the computer from any related Job schedules. If it is on its own schedule, delete the schedule.…
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Should I protect an Asset using VM, File Agent, or Image Agent backups?
SUMMARY With 10.3 and higher releases, customers have more choices for types of backups methods than prior. This KB will attempt to explain the supported best practices for these varying backup types ISSUE With Unitrends Release 10.3 and higher, customers have more choices for types of backups methods than prior. Each of…
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How to Create a Selection List
SUMMARY How to create a selection list to specify files to include in or exclude from the backup. ISSUE You can use selection lists with file-level backups to limit the files that are included in your backups. You can use inclusion lists to specify which files to include in the backup, or exclusion lists to specify which…
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File Level Slow Backup Performance on Xen Guest Windows Operating System
SUMMARY File Level Slow Backup Performance on Xen Guest Windows Operating System ISSUE Summary Slow backup performance of Windows guests operating systems on Citrix XenServer hosts because of network settings. Symptoms A dramatic loss in network performance after backup job begins. Back speed slows to less that 1% of…
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Incremental backup promoted to a full after a live migration failure for a Hyper-V VM
SUMMARY This article explains why incremental backups are promoted to full backups after a live migration failure. ISSUE If a live migration for a Hyper-V VM fails but the owner node changes, the Hyper-V CBT driver cannot compare changes on the VM with its snapshot entries. As a result, the next incremental backup is…
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iSeries Backup Menu
SUMMARY iSeries Backup Menu ISSUE Description Customers may wish to access the iSeries Menu (or other console configuration screens) from command line without accessing the physical device console. Some older units also used an xOrg interface for this option which was removed after Unitrends release 6.3. Resolution The…
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The appliance may erroneously attempt an incremental backup following VM configuration change
SUMMARY The appliance may erroneously attempt an incremental backup following VM configuration change. ISSUE After changes are made to a protected VM (e.g. adding a new disk or VM hardware version change) normally the next incremental backup to run would fail, and promote the following backup to a full backup…
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Hyper-V backups may fail with volsnap errors
SUMMARY Hyper-V backups may fail with volsnap errors. ISSUE Hyper-V backups may fail with volsnap errors. RESOLUTION To resolve this issue, upgrade your appliance to version 10.3 or later. CAUSE Two issues may contribute to the above symptoms: * The Hyper-V Virtual Disk can grow larger than the expected maximum size. *…
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Mynotify change tracking - threshold
ISSUE Linux change journal reports wrapping or audit of restore points results in missing recovery objectives. RESOLUTION Recent development efforts have classified a rule of thumb of 100 changes per second as being the threshold to safely track mynotify changes. To view this: Using an editor such as VI:…