Features and Benefits of HSG80 ACS 8.6P Data Replication Manager

Features and Benefits of HSG80 ACS 8.6P Data Replication Manager 8
Windows 2000 and Windows NT Large LUN Support—After enabling the Windows Large
LUN feature within the operating system, DRM supports up to 64 LUNs in SCSI-2 mode or 63
LUNs in SCSI-3 mode.
Note: A single DRM instance is limited to 12 remote copy sets and 12 non disaster-tolerant
LUNs per site for a total of 36 LUNs. Even this exceeds the drive letter limit of Windows 2000 or
Windows NT.
DRM Dual Switch/Single Site solution—The DRM Dual Switch/Single Site solution allows
customers to implement a host-independent remote copy solution at the departmental level within
the enterprise. This solution does not provide protection against most natural disasters due to its
limited separation distance. This solution is supported by all DRM supported operating systems.
A specific solution for the Microsoft Windows 2000 and Windows NT environment is available
using the Departmental DataSafe solution available at
www.compaq.com/products/storageworks/solutions/essa/deptdatasafe.html
Extended SANs over direct Fibre Channel—DRM replicates data over direct Fibre Channel
networks of up to 100 km (62 miles) by way of the Very Long Distance GBIC. Data replication
can be performed at full 100 MB/sec Fibre Channel speeds to approximately 50 km (31 miles).
An intersite link longer than 50 km (31 miles) cannot maintain the full 100 MB/sec data rate
because of the limited number of buffer-to-buffer credits available in the current version of switch
firmware. The longwave GBIC for full Fibre Channel bandwidth data transmission up to 10 km
(6.2 miles) is also available.
Extended SANs over IP capability—When available, DRM can use new Fibre Channel (FC) to
IP network gateways to extend the SAN across large distances using the existing IP network
infrastructure. These industry-standard gateways provide the needed network interface and use
IP-based tunneling technology to provide the dedicated bandwidth and data protection.
For more information on Extended SANs over IP capability, refer to the Compaq SANworks Data
Replication Manager over an Internet Protocol Link Application Note at
www.compaq.com/products/sanworks/drm/documentation.html
Extended SANs over ATM—Disaster recovery sites can be located hundreds, even thousands,
of miles from their corresponding production sites with the use of FC-to-ATM Open Systems
Gateways (OSGs). The OSG provides FC-to-ATM connectivity in telecommunication networks
for Compaq SANworks extended SAN-WAN-SAN solutions. ATM connectivity is designed for
contingency sites that must be very long distances apart to protect against wide area disasters or
where direct fiber optic connectivity is unavailable.
The FC-to-ATM gateways provide a wide range of WAN support and flexibility to meet
customer requirements in the most cost-effective manner. The FC-to-ATM gateway offers an
OC3 multimode fiber (MMF) physical interface and supports access speeds ranging from
1.544 Mb/sec to 155 Mb/sec. Data rates less than OC3 (155 Mb/sec) require the ATM switch
(available from a WAN provider).
• Multiple T1 lines—With the optional ATM switch, the FC-to-ATM OSG can support one or
more T1/E1 lines. Multiple T1/E1 lines provide increased bandwidth for customers who need
faster data rates. Load balancing across these multiple lines is a function of the switch and the
interconnect to the multiplexer.
• Fractional ATM lines—The FC-to-ATM OSG can support fractional lines, such as
fractional T3/E3 or fractional OC3 lines. By supporting fractional ATM lines, customers can
lease the exact bandwidth or access speeds necessary to support their requirements.