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In a generic application environment, data needed for service is not in the system that has cluster but exists in other system.
ㅇSince data does not exist, there is no need to configure disk resource. Only application program exists in general in this environment.
[Figure] Basic Application Environment
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Shared disk (SCSI or SAN) is connected to both servers physically.
MCCS attaches the file system on shared disk to the only active server and lock to the standby server to prevent file system corruption.
[Figure] Shared Disk Environment
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Each local disk exists in each server and data is replicated real-time to the disk of another node.
Least unit of disk replication is in partition unit. (Recommended unit : LUN)
[Figure] Mirror Disk Environment
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