.Part 4 SAN Extension and Bridging HP SAN Design Reference Guide 785354-001

• Allows delta snapshots using Microsoft VSS interface, and performs automatic delta snapshots
of application hosts to reduce potential data loss.
• Offers several application-specific licensed agent options:
Microsoft Visual SourceSafe◦
◦ Microsoft Exchange
◦ Microsoft SQL
◦ Oracle Database (for a single Microsoft iSCSI initiator)
Clustering
Clustering is an upgrade license for the HP ProLiant Storage Server iSCSI Feature Pack (Gateway
Edition only). The clustering option:
• Activates two-node iSCSI target capability using MSCS
• Eliminates a single point of failure with a dual network connection to the IP network and a
dual I/O channel to each storage device
Direct Backup
The Direct Backup option is an upgrade license for HP ProLiant Storage Server iSCSI Feature Pack.
The Direct Backup option:
• Works with Microsoft iSCSI initiators only
• Facilitates centralized, zero-impact backup
• Allows administrators to use their preferred backup software for centralized backup and
recovery of application data directly from the iSCSI storage server
Designing a Microsoft Exchange solution with iSCSI Feature Pack
A Microsoft Exchange solution requires that you configure the network, host, and storage systems
for iSCSI NAS. The HP ProLiant Storage Server iSCSI Feature Pack provides iSCSI functionality on
a Windows Storage Server (NAS device). Exchange Server 2003 also requires an iSCSI initiator.
Network design
Existing IP networks may not be suitable for iSCSI storage support. Evaluate traffic on these networks
to determine if there is adequate capacity to meet storage requirements.
HP recommends a dedicated GbE network for accessing the Windows iSCSI NAS Storage Server.
This provides adequate performance and data security. You can also use IPsec to secure the
connection on a public, unsecured network, with decreased performance.
The distance between the Exchange server and the iSCSI NAS Storage Server may affect
performance. You must check the maximum supported distances of the network devices. The
maximum distance varies based on the cable type and specifications.
Hardware selection
The Windows Server Catalog is available at http://www.windowsservercatalog.com/.
It lists iSCSI hardware components that are qualified under the Designed for Windows Logo
program, Exchange Server 2003 and Exchange Server 2000.
362 iSCSI storage