
• Backup server
• Backup client or clients
• Backup media servers
The backup server runs the backup software and manages the backup process by communicating
with the backup agents and the media servers. Backup clients negotiate with the applications and
prepare the data for backup. The media servers take the data that the backup agent prepared and
write the data to tapes or disks.
To implement a solution with servers that use the VSM virtual disks, through DPMs, you must expose
the application servers and the media servers to the SAN CLI virtual disk and install the SVSP VSS
storage provider on the backup client server where the application, the writer, exists. Exposing the
servers to the SAN CLI virtual disk makes the servers ready to service the VSS command that the
backup software initiates.
The following images show a configuration example of Veritas NetBackup software that uses VSS
snapshots. The configuration consists of two servers:
• One server runs the application and has an adequate backup client installed.
• The second server runs the backup software and acts also as the media server.
Figure 22 shows a configured MS-Windows-NT backup policy for three drives (x, y, w) on a computer
named SRV-00-016. The backup is written to a storage unit labeled srv-00-015-disk.
Figure 22 Veritas NetBackup software using VSS snapshots
.
Figure 23 shows that the srv-00-015-disk storage unit is actually a disk drive that is connected to
server srv-00-015, which acts as the media server.
Microsoft Volume Shadow Copy Service106
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