HP LH4r HP Netserver LXr 8000 30/FC Config Guide for Windows NT4.0 Clusters - Page 2
Microsoft Windows NT Server 4.0, Enterprise Edition.
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System software: Navigator version Operating System Service pack Single Points of Failure (SPOF) L.14.00 or later Microsoft Windows NT Server 4.0, Enterprise Edition. SP3 with hotfix "clusfixi" or later The Model 30/FC Disk Array virtually does not have single points of failure. However, care should be taken to bind LUNs as described in the Model 30/FC Disk Array manual. The manual addresses topics such as; spreading LUNs equally across internal buses and using RAID modes. In a cluster configuration, single points of failure arise due to the method used to connect the disk array to the server. These single points of failure are as follows: • Due to Windows NT inability to allow for dual data paths, a total fibre-channel hub failure (removal of power from the hub, catastrophic failure of multiple hub ports) will result in the loss of the cluster. It is possible to power the hub using an UPS to remove part of the issue, however an unforeseen total hub failure would still be a single point of failure. Current data on the fibre channel hub indicates that risk in this area is minimal. • If the data connection between the hub and Model 30/FC Disk Array is broken the cluster will go down. The fibre channel cables are generally known to be robust with an insignificant possibility of failure. • A failure in the storage processor of the Model 30/FC Disk Array will result in a loss of the cluster. The possibility of the storage processor failing is small. Current configurations do not allow for failover to another storage processor in the Windows NT environment. SPU Model Clock speed No. of CPUs BIOS version CPU cache RAM No. of power supplies Local storage I/O slots: HP NetServer LXr 8000 400 MHz. or higher 2 - 4 Release 1 or later Any size 256 MB minimum. Must be HP. 3 Internal or external, using any controller except NetRAID 1 or 3. Must use HP disks. See Local Storage below. P3 - P4 Shared storage controller P1 - NetRAID local storage P5 - Intra-cluster (Heartbeat) LAN P6 - Client LAN All others - Any other plug-in cards. 2