Compaq AA-RHGWC-TE manual Clusterwide Disks, Member Boot Disk

Because the Tru64 UNIX operating system will be available on the first cluster member, in an emergency, after shutting down the cluster, you have the option of booting the Tru64 UNIX operating system and attempting to fix the problem. See the TruCluster Server Cluster Administration manual for more information.

1.3.1.2 Clusterwide Disk(s)

When you create a cluster, the installation scripts copy the Tru64 UNIX root (/), /usr, and /var file systems from the Tru64 UNIX disk to the disk or disks you specify.

We recommend that the disk or disks used for the clusterwide file systems be placed on a shared SCSI bus so that all cluster members have access to these disks.

During the installation, you supply the disk device names and partitions that will contain the clusterwide root (/), /usr, and /var file systems. For example, dsk3b, dsk4c, and dsk3g:

dsk3b cluster_root#root

dsk4c cluster_usr#usr

dsk3g cluster_var#var

The /var fileset cannot share the cluster_usr domain, but must be a separate domain, cluster_var. Each AdvFS file system must be a separate partition; the partitions do not have to be on the same disk.

If any partition on a disk is used by a clusterwide file system, only clusterwide file systems can be on that disk. A disk containing a clusterwide file system cannot also be used as the member boot disk or as the quorum disk.

1.3.1.3 Member Boot Disk

Each member has a boot disk. A boot disk contains that member’s boot, swap, and cluster-status partitions. For example, dsk1 is the boot disk for the first member and dsk2 is the boot disk for the second member:

dsk1	first member’s	boot	disk	[pepicelli]
dsk2	second member’s	boot	disk	[polishham]

The installation scripts reformat each member’s boot disk to contain three partitions: an a partition for that member’s root (/) file system, a b partition for swap, and an h partition for cluster status information. (There are no /usr or /var file systems on a member’s boot disk.)

A member boot disk cannot contain one of the clusterwide root (/), /usr, and /var file systems. Also, a member boot disk cannot be used as the quorum disk. A member disk can contain more than the three required

Introduction 1–3