Compaq AA-RHGWC-TE manual Introduction

file systems and the data disks across SCSI buses, removing the single SCSI bus as a single point of failure for these file systems.

1.5.3Two-Node Configurations with UltraSCSI BA356 Storage Units and Dual SCSI Buses

By adding a second shared SCSI bus, you now have the capability to use the Logical Storage Manager (LSM) to mirror data disks, and the clusterwide /usr and /var file systems across SCSI buses.

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You cannot use LSM to mirror the clusterwide root (/), member system boot, swap, or quorum disks, but you can use hardware RAID.

Figure 1–5 shows a small cluster configuration with dual SCSI buses using LSM to mirror the clusterwide /usr and /var file systems and the data disks.

Introduction 1–11