In a mirror setup, you need two (2) disks with following minimum disk space:
In the active and running boot environment:
/var: 85GB for the Enterprise Controller and Proxy Controller run time
/: 30GB for the Enterprise Controller and Proxy Controller install and data
Enterprise Controller Libraries
15 GB for the EC library
45 GB for the Oracle Solaris 11 Software Update Library
5 GB per channel for the Linux, Solaris 8-10 Software Update Library
Database
See Table 3-1 for database sizing. The following is an example estimated database size for 400 assets: 160 GB for the database plus 400 GB reserved for backups
Sufficient storage disk space is critical in optimizing performance.
The following configurations are applicable for a SPARC platform:
The OS disk configuration is on a Fibre Channel hardware RAID.
The Oracle Enterprise Manager Ops Center data is on a Fibre Channel hardware RAID.
The following are recommended disk configurations:
Place the /var/opt/sun/xvm directory on a different set of disk spindles from the operating system. Do not co-mingle with the OS.
Use at least 4 spindles in the hardware RAID cache configuration.
Place the OS on multiple spindles with hardware RAID cache. If the hardware does not allow this with internal drives, then boot from SAN
The Proxy Controller software is considered relatively lightweight and, in all but the extreme scale cases, does not require a dedicated system.
The following configurations are applicable for SPARC platforms:
The OS disk configuration is on a Fibre Channel hardware RAID.
The Oracle Enterprise Manager Ops Center data is on a Fibre Channel hardware RAID.