Q-Logic 8200 SERIES manual How the Solution Protects Against Failures, Setup Requirements

2 – General Description Supported Network Configurations

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2.3.3.1

How the Solution Protects Against Failures

The following tables provides a list of common failure points in a network and the corresponding protection that this high-availability solution provides.

Table 2-1. High-Availability Solution Protection Against Network Failures

Failed Component:	Protection:
HBA or path to	Host software uses a remaining HBA or path to the same SANbox
SANbox SSP	SSP
All HBAs or paths to	Virtual volume becomes active on alternate SANbox SSP, host
one SANbox SSP	software uses alternate HBA
One SANbox SSP	Virtual volume becomes active on alternate SANbox SSP, host
	software uses alternate HBA
One path between	■ Back-side I/O uses alternate path
one SANbox SSP	■ LUN uses alternate storage controller, if necessary
and storage
All paths between	■ Virtual volume becomes active on alternate SANbox SSP
one SANbox SSP	■ Host software uses alternate HBA
and storage
Storage controller	■ Back-side I/O uses path to alternate storage controller
SVM appliance	Alternate SVM appliance takes over system management
One or more paths	Alternate SVM appliance takes over system management
between one SVM
and one SANbox
SSP

2.3.3.2

Setup Requirements

To configure a high-availability solution using SVM appliances and SANbox SSPs, you must make sure that:

■Each HBA sees only one SANbox SSP.

■Each host sees both SANbox SSP in the high-availability solution, and no others.

■Each StoreAge SVM appliance sees both SANbox SSPs.

■Each StoreAge SVM appliance sees all storage ports.

■If the storage includes dual-controller active/passive RAIDs, each SANbox SSP is cross-connected with the controllers, which means that each SANbox SSP must see both controllers in the RAID.

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