Compaq ProLiant 400 Compaq Leadership in Server Innovations - Page 8

Doc. No. ECG072/0298 WHITE PAPER COMPAQ LEADERSHIP IN SERVER INNOVATIONS complete server failures. The options include Standby Recovery Server (SRS), On-Line ... q 8 Recovery Server (OLRS), and On-Line Storage Controller Recover Option (OSCRO). Each of these configuration options provides fully automated detection of failures and fully automated recovery within a minimal amount of time. Each of these configurations can be implemented in Microsoft NT Server Standard Edition or Novell NetWare environments. Key Benefits - Standby Recovery Server: With Standby Recovery Server, one ProLiant or ProSignia server stands by as an idle backup for the other. Both servers are attached to a common set of ProLiant Storage Systems holding a single copy of the operating system and data. If the primary server fails, the recovery server automatically boots and brings users back on-line in minutes. This configuration offers increased system and application availability and affordability. In this SRS configuration, failover is uni-directional, from the active server to the standby server. On-Line Server Recovery (OLRS): With OLRS, two ProLiant or ProSignia servers are concurrently active, processing independent workloads. Each server acts as a backup for the other. In the event of failure of either server, the failure is automatically detected and workloads are automatically transferred to the other server in the cluster, where the applications are re-started , returning full productive services to end users. In this OLRS configuration, application failover is bi-directional. Benefits include increased system availability, fully automated switchover, the ability to pair independently operating servers with identical or different hardware configurations, the ability to schedule server maintenance at a convenient time, and low cost. On-Line Storage Controller Recover Option (OSCRO): is an automatic failover system for single-server environments that provides storage controller redundancy, automatic recovery from storage controller failure, and higher data availability at a cost-effective price. In an OSCRO configuration, two SMART-2 array controllers are linked into a pair using the OSCRO software. One controller acts as a hot standby for the primary controller. In the event of a failure of the primary controller, the access and control of the storage subsystem automatically fails over to the standby controller, providing a continued connection with no loss of data availability. OSCRO offers redundancy at the controller level, providing very high data availability at a very low cost. Compaq Advantage - Compaq was the first company in the industry to offer low cost, highly effective solutions for automatic recovery from controller and server failures in the NT Server and Novell environments. The Recovery Server Option has been available since May 1995 and is currently installed at over 8,000 customer sites worldwide, making it a recognized leader in High Availability clustering solutions. RAID -, Redundant Array of Inexpensive (or Independent) Disks, is a way of storing data across several drives to improve performance and/or provide fault tolerance. If one drive on a system fails, its data will be reconstructed from the other drives in the array. Compaq offers two distinct array controllers to cover the spectrum of business needs: the SMART-2DH Array Controller and the SMART-2SL Array Controller. Key Benefits - The SMART-2DH Array Controller offers performance, fault tolerance, and capacity expansion. Customers can add the SMART-2DH controllers up to the number of available PCI slots in their servers. Online expansion keeps information accessible even as customers add storage. The array accelerator is also removable. The SMART-2SL Array Controller provides investment protection and a low cost solution for implementing RAID technology. Customers can also easily upgrade to the SMART-2DH controller. Compaq Advantage - Compaq was the first company with RAID controllers in the x86 server marketplace. Compaq was also the first to put write cache on the controller, to introduce fast SCSI, hot-pluggability, and a fast, full-speed PCI bus with online expansion of