Compaq AA-RHGWB-TE manual 12Introduction

1.6.3Two-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.

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