Symantec NetBackup, Manual

Page: 138 / 168

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Environments that do not use Fibre Channel, such as SCSI switches or
multi-initiator configurations
See “Frequently asked questions about Shared Storage Option” on page 165.
About Shared Storage Option components
The NetBackup Enterprise Media Manager (EMM) manages media information.
The Enterprise Media Manager also is the device allocator (DA) for shared drives.
Figure 15-1 shows an example of a shared drive configuration.
Figure 15-1
Shared Storage Option example
Host A
EMM Server
Device allocation host
Data path
Data path
Data path
Data path
Host adapter
Host adapter
Robot TLD (0)
Robot control
DRV1 DRV2
Hardware
connection
Host B
Scan host
(avrd)
(ltid)
(avrd)
(ltid)
(nbemm / DA)
(vmd)
Path
Control
Hardware
(vmd)
In this figure, the following describes Host A:
■
It is connected to drives DRV1 and DRV2 through SAN hardware.
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Host A is the first host in the environment to come online with a non-zero
scan ability factor. Therefore, it is the initial scan host for its drives.
See “About scan hosts” on page 139.
In this figure, the following describes Host B:
Introducing the Shared Storage Option
About Shared Storage Option components
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