To Share or Not to Share, That is the Question

When Microsoft introduced the Windows 2000 operating system, they introduced a new way of managing disks and the capacity they contained. Developed in conjunction with VERITAS Software, Disk Management in Windows 2000 uses the concept of dynamic disks to allow users to dynamically configure their storage i.e. no reboots. The default disk type, referred to as basic, allows for the creation of partitions and logical drives, much in the same vein as Disk Administrator in Windows NT. Dynamic volumes are configured on dynamic disks.  This COTS (Commercial off the shelf) package cannot standup to Symantec CDS (Cross Platform Data Sharing). Symantec CDS (Cross Platform Data Sharing) allows data volumes and their contents to be easily migrated between heterogeneous systems.  Another good example is where an executable file, compiled on one platform, can be accessed across platforms (using CDS). You do not need a file system in the stack if the operation system provides access to raw disks and volumes, and the application can utilize them.  Databases and other applications can have their data components built on top of raw volumes without having a file system to store their data. CDS is a license-enabled feature that is supported at the disk group level by VxVm that supports and at the file system level by VxFS.  For example, if a VxFS file system on a VxVM volume contains files comprising a database, the following functionality applies:
  • Disk can be reconfigured (as CDS disks) across platforms.
  • Disk groups can be imported across platforms.
  • The file system can be mounted on different platforms.