![]() ![]() When you use logical volumes, you can assign multiple physical disks to the same logical volume, which means that all those disks are seen as one partition from the user’s perspective. This allocation of unpartitioned space can be done dynamically through both the command line and graphical user interfaces without rebooting the computer. Logical volumes allow you to leave unpartitioned space on the hard disk and add it to a specific partition as needed without having to back up your data and reformat the hard drive. In the following sections, I will point out the features of the LVM. While Linux can run on a single partition, additional partitions improve system performance. Linux assumes that a hard drive will be partitioned as part of the basic operating system installation, with specific partitions called “/var,” “/usr,” “/tmp,” “/home” and “/boot.” The “/boot” partition is where your operating system lives, while the other partitions hold applications, spool files and error logs, temporary data, and user data. Windows and OS X assume that the hard drive is a single monolithic partition. The capability has been built into the Linux kernel since 1999. Logical volumes are an alternate method of partitioning hard drive space. ![]() We have a volume manager called “LVM,” which comes with OS installation by default in the Linux operating system. This blog will outline and dive deeper into the components of a Veritas Volume Manager. You can now remove your Photon device for servicing, without affecting other operations.Symantec’s Veritas Volume Manager (VxVM) is a storage management subsystem that allows you to manage physical disks as logical devices called volumes. To do this, when the current license is due to expire, VxVM automatically removes the old license, and re-issues a new Photon license with another two-week expiration date. In addition, VxVM 5.0 allows you to remove your Photon device for servicing for up to two weeks. VxVM automatically generates a Photon license when it detects an A5k array. Storage Expert#Veritas Volume Manager = Enabled SPC Lite#Veritas SANPoint Control = Enabled Product Name = Veritas Storage FoundationĬPU Count#Veritas Volume Manager = Not RestrictedĬPU Count#Veritas File System = Not Restricted License Key = XXXX-XXXX-XXXX-XXXX-XXXX-XXXX CDS licenses are included as part of the Veritas Storage Foundation license.Īn example of a CDS enabling license (output by the vxlicrep command) is: ![]() The ability to import a cross-platform data sharing (CDS) disk group on a platform that is different from the platform on which the disk group was last imported is controlled by a CDS license. # vxdctl license Cross-platform data sharing licensing ![]() To see the license features that are enabled in VxVM 5.0, enter the command: You need a Full VxVM license to make effective use of Add-on licenses to VxVM. The following table shows the levels of licensing in Veritas Volume Manager 5.0 above the Basic license, and the features supported at each level:Ĭoncatenation, spanning, rootability, volume resizing, multiple disk groups, co-existence with native volume manager, striping, mirroring, DRL logging for mirrors, striping plus mirroring, mirroring plus striping, RAID-5, RAID-5 logging, Smartsync, hot sparing, hot-relocation, online data migration, online relayout, volume snapshots, Intelligent Storage Provisioning, FastResync with Instant Snapshots, Storage Expert, Device discovery Layer, multipath DMP, and VEA.įeatures that augment the Full VxVM license. VxVM also provides easy-to-use, online storage management tools to reduce planned and unplanned downtime. Veritas Volume Manager is a storage management tool that removes the physical limitations of disk storage so that you can configure, share, manage, and optimize storage I/O performance online without interrupting data availability. ![]()
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