Dell PowerVault TL4000 Dell PowerVault TL4000 Failover Configuration Guide - Page 9

Multiple Host Failover configuration, Failover Reference Configuration 6

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Dell PowerVault™ TL4000/TL2000 Failover Guide Multiple Host Failover configuration (two hosts, two FC switches, and 2 FC drives) Main Path Failover Path Figure 5: Reference Configuration 5 Note that a SAN environment is susceptible to backup performance issues due to the sharing of resources across multiple hosts. A failover event in the system can potentially complicate the performance issues. Failover is a means to maintain the data storage flow in the event of a failure along the communication path between the host and the drive or library, but the environment manager must monitor the state of the system to ensure all the paths are active. Failover Reference Configuration 6: One host with dual port SAS HBA and one Dell PowerVault™ with a single SAS drive In this configuration, failover occurs only if one of the HBAs fails. This configuration only supports data path failover as there is no second drive to failover the control path. The physical connection of this configuration is shown in Figure 6. 9|Page 12/31/09 version 2.0 Always refer to www.dell.com\support for latest documentation and updates

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Dell PowerVault™ TL4000/TL2000 Failover Guide
9|
Page
12/31/09
version
2.0
Main Path
Failover Path
Multiple Host Failover configuration
(two hosts, two FC switches, and 2 FC drives)
Figure 5: Reference Configuration 5
Note that a SAN environment is susceptible to backup performance issues due to the sharing of
resources across multiple hosts. A failover event in the system can potentially complicate the
performance issues. Failover is a means to maintain the data storage flow in the event of a failure along
the communication path between the host and the drive or library, but the environment manager must
monitor the state of the system to ensure all the paths are active.
Failover Reference Configuration 6:
One host with dual port SAS HBA and one Dell PowerVault™ with a single SAS drive
In this configuration, failover occurs only if one of the HBAs fails. This configuration only supports data
path failover as there is no second drive to failover the control path. The physical connection of this
configuration is shown in Figure 6.
Always refer to www.dell.com\support for latest documentation and updates