You must install the Arcserve Backup SAN Option and Tape Library Option before you can start using dynamic device sharing (DDS).
In an environment composed of fibre attached storage devices with one or more Arcserve Backup servers, complications can arise when exposing devices that reside on the fibre uniquely. Duplication of devices occurs when more than one fibre adapter exists to enumerate the devices on a fibre loop.
Note: If individual media engines reside on the same SAN, you must collect and organize multiple media engines from a central management application to ensure that these engines integrate seamlessly.
In this case, an NDMP tape server running on a NAS device is considered a media engine. The Arcserve Backup tape engine is also considered a media engine. Using this feature will allow them to integrate seamlessly.
When separate fibre adapters exist to enumerate devices on a fibre loop, DDS dynamically manages all duplicate references to a device. DDS gives you more flexibility in choosing how to design your storage topology.
DDS is cost efficient because only one library is needed for backing up NAS and non-NAS data.
You can do the following with DDS:
Note: DDS does not support restoring local backups to a NAS server, or NAS server backups to the local Arcserve Backup server. This limitation exists because NAS backups are third-party backups, and are written in a format that is proprietary to the NAS vendor.
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