1.4 Reliability

Your storage solution must provide reliable access to data for users and applications. One way to improve reliability is through redundancy of components in order to avoid single points of failure in your network design. OES supports redundant devices, connections, and servers.

Storage Requirement	Novell OES Solution
Reliable access to data in the event of disk failure: The ability to provide fault-tolerant solutions to allow users and applications to access data in the event of disk failure.	NSS software RAID 1 and RAID 5 devices provide disk fault tolerance. NSS supports software RAIDs 0, 1, and 5. For information, see Managing NSS Software RAID Devices in the OES 11 SP3: NSS File System Administration Guide for Linux.
Reliable access to data in the event of connection failure: The ability to provide fault-tolerant solutions to allow users and applications to access data in the event of connection failure.	On Linux, you can manage multipath I/O with Device Mapper Multipath tools. For information, see Managing Multipath I/O for Devices in the SLES 11 SP4 Storage Administration Guide.
Reliable access to data in the event of server and application failure: The ability to provide fault-tolerant solutions to allow users and applications to access data in the event of server or application failure.	Novell Cluster Services provides server and application fault-tolerance options. For information, see the OES 11 SP3: Novell Cluster Services for Linux Administration Guide.

Storage Requirement

Novell OES Solution

Reliable access to data in the event of disk failure: The ability to provide fault-tolerant solutions to allow users and applications to access data in the event of disk failure.

NSS software RAID 1 and RAID 5 devices provide disk fault tolerance. NSS supports software RAIDs 0, 1, and 5.

For information, see Managing NSS Software RAID Devices in the OES 11 SP3: NSS File System Administration Guide for Linux.

Reliable access to data in the event of connection failure: The ability to provide fault-tolerant solutions to allow users and applications to access data in the event of connection failure.

On Linux, you can manage multipath I/O with Device Mapper Multipath tools. For information, see Managing Multipath I/O for Devices in the SLES 11 SP4 Storage Administration Guide.

Reliable access to data in the event of server and application failure: The ability to provide fault-tolerant solutions to allow users and applications to access data in the event of server or application failure.

Novell Cluster Services provides server and application fault-tolerance options. For information, see the OES 11 SP3: Novell Cluster Services for Linux Administration Guide.