Dell PowerVault TL2000 Manuel d'utilisateur télécharger pdf (Page 2)

Dell PowerVault^*^ TL4000/TL2000 Failover Guide

What is Failover?

Failover is an optional feature available for the Dell PowerVault ™ TL4000 and TL2000 Tape libraries.

Failover is designed to provide automatic path failover to a preconfigured redundant path in the event

that a host adapter or control path drive is lost without aborting the current job in process. Failover

provides error recovery on an alternate path when a permanent error occurs on the primary path. The

failover event is enabled by the tape library and handled by the device driver making it transparent to

the running Backup Application.

There are two types of Path Failover, Data Path Failover (DPF) and Control Path Failover (CPF). They are

closely related however the difference is that DPF is an automatic failover support for the transfer of

data, which provides error recovery for systems connected to tape drives while CPF is an automatic

failover support for the transfer of commands to move tape cartridges. Please refer to the Failover

supported configuration sections of this document for examples of different configurations that can be

constructed.

Dell PowerVault™ TL2000/TL4000 Configuration Support matrix

The configuration matrix section provides a quick reference to drive configurations that support failover

in a Dell PowerVault™ TL2000 or TL4000 library.

Important Note: Failover is not supported for any configuration containing LT03 drives

Drive LT03 Drives

LT04 Drives LT05 Drives

Supported

Drive

Failover

Support

Supported Failover

Drive Support

Supported

Drive

Failover

Support

SAS Full Height Yes

SAS Half Height

Yes No

Yes ^ No Yes Yes*

Table 1: Dell PowerVault™ TL2000 Supported Failover Configuration Matrix

*Requires a Dell PowerVault™ TL2000 library configured with two LT05 Half Height drives

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Dell PowerVault TL2000 Manuel d'utilisateur Page 2