Appendix C Raid Array Configuration - HP D7171A - NetServer - LPr Configuration Manual

APPENDIX C RAID Array Configuration

The following two examples illustrate the RAID array configuration process for HP NetServer Clusters:
Setting up RAID 1 arrays on an HP NetServer cluster
Setting up RAID 5 arrays on an HP NetServer cluster
After you have finished defining and configuring the cluster's arrays using HP NetRAID Assistant, you will need to
return to Part 5 and finish array configuration using the Windows NT Disk Administrator utility.
Setting Up RAID 1 Arrays on an HP NetServer Cluster
The HP NetRAID adapter and proprietary HP NetRAID software can be used to organize the cluster's disk storage
into RAID level 1 disk arrays. Each level 1 RAID array is composed of two hard (hot swap) drives located in
external shared storage cabinets.
RAID level 1 (mirroring) provides storage redundancy with maximum performance. A RAID 1 array consists of two
drives that contain exactly the same data. That is, all of the data on one drive is replicated (mirrored) on the other.
Stripe
1
2
3
The preceding table shows how data is distributed for RAID 1. Since each drive contains a complete copy of all
data, all data is still available after the failure of one drive. To rebuild the RAID array after a failure, the failed drive
is replaced and the data simply copied from the good drive to the new drive.
HP NetServer LH Pro Microsoft Cluster Installation Guide - 1 October 1997
Raid Level 1 Data Distribution
Drive 1
Block 1
Block 2
Block 3
Drive 2
Block 1
Block 2
Block 3
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