Quantum DXi8500, User Manual

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Chapter 1: DXi8500 System Description
Hard Drive Storage
Quantum DXi8500 User’s Guide 21
NFS Protocol
The NFS (Network File System) protocol was originally designed by
Sun™ Microsystems and allows all network users to access shared files
stored on computers of different types. NFS provides access to shared
files through an interface called the Virtual File System (VFS) that runs
on top of TCP/IP. Users can manipulate shared files as if they were stored
locally on the user's own hard disk. With NFS, computers connected to a
network operate as clients while accessing remote files, and as servers
while providing remote users access to local shared files. This protocol is
used with UNIX and Linux networks. It can also be used with Windows
networks.
Figure 5 NAS Backup Via CIFS
and NFS
OpenStorage (OST)
With the OST presentation, the DXi system presents storage servers to a
Symantec NetBackup or Backup Exec media server through a specific
Symantec protocol. A storage server consists of logical storage units
(LSUs), which are similar to directories in a NAS file system or tape
cartridges in a VTL partition.
The OST presentation requires the Symantec NetBackup (6.5.3 or later)
or Backup Exec 2010 or later host application and the OST Plug-in client
installation on the media server. Plug-in clients are host-OS dependent
and are supplied by Quantum. To use the DXi in OST mode, you must
configure an OST storage server and LSUs on the DXi. You must also
map the LSUs on the NetBackup server so that NetBackup can perform
backups and restore from them. Additionally, policies for optimized
duplication (OST replication) and OST direct to tape may need to be set
on the NetBackup server.