#### Setting up the shared disk

JReport Enterprise Server cluster requires a place to store certain files generated or required when the cluster is functioning, such as properties files, realm files, resource information files, temporary files, and history files. To accomplish this goal, you can use a shared disk, which can be one of any network disks (or directories) that can be accessed by the servers in the cluster. The shared disk shares a common drive letter on all clustered servers.

Since the shared disk is a mapped network disk (or directory) with a common drive letter on all clustered servers, you have to map the shared network disk (or directory) on each machine individually (to map a network drive, open a My Computer window, then on the Tools menu, click Map Network Drive).

To set up a shared disk:

1. Share a disk (or directory), which can be on any computer in the network, so that the disk (or directory) can be mapped to a drive letter by a clustered server. A reliable and stable system is recommended for the shared disk (or directory), since a lot of file-accessing operations will take place there.
2. On each clustered server, map the shared directory to a drive letter. Keep in mind that you should use the same drive letter for all the clustered servers. If for example, K is used as the drive letter for the mapped drive, then all the servers in the cluster should use K as the drive letter for the mapped drive.