Transcript
A disk storage device is a logical container where physical mount paths are used as backup locations. Storage is added by configuring the disk storage and then adding mount paths. Backup locations can be drive letters or UNC paths. Disk storage can be network attached, SAN attached or direct attached storage. Each network attached storage, or NAS, provides a path to the storage directly through the NAS device. This means that using CIFS or NFS, UNC paths can be configured to read and write directly to storage. This provides better resiliency compared to direct attached or SAN attached storage. When using shared network storage with two or more media agents and partition de-duplication, NAS storage is the preferred connection method. When using SAN storage, one or more media agents can be configured to access a shared disk device. This provides greater scalability compared to direct attached storage. However, if a media agent fails, data from the LUN which is managed by the media agent cannot be recovered. This could be a problem in a shared storage configuration, where the failure of one media agent may result in no restorable data until the media agent is brought back online. Direct attached storage means the disk device is physically attached to the media agent. The primary advantage in this design is simplicity. However, if the media agent controlling the disk device fails, data stored on the disk cannot be recovered until the media agent is repaired or replaced.
