HP StorageWorks MSA1510i HP StorageWorks 1510i Modular Smart Array installatio - Page 36

• Depending on the number of physical hard drives included in a storage unit, the Storage Management Utility may suggest RAID 6 (ADG) as the default RAID level, which offers a high level of fault tolerance and usable disk capacity, but at a significant cost to I/O performance. For comparable fault tolerance but higher performance, consider using RAID 1+0 when fault tolerance is desired and performance is more important than usable capacity. Reserve RAID 6 for situations when fault tolerance is desired, but usable capacity is more important than performance. • The SMU Initial Configuration Wizard creates one or more logical drives, creating the largest logical drives possible (up to two Terabytes). The wizard detects the number of storage enclosures, number of unconfigured hard drives, drive size, and other characteristics; and then applies your selected RAID level and spare option to create the logical drives. If you need greater control over the storage configuration, such as multiple, smaller logical drives, or multiple logical drives with differing RAID levels, use the SMU main user interface to configure your system. • The SMU Initial Configuration Wizard creates one target for the storage, with all logical drives assigned to that target as LUNs. If multiple targets are needed for your environment, use the SMU main user interface to configure the logical drives, create the targets, and then assign the logical drives to the targets as LUNs. • After configuring the storage, remember to: • Verify that each initiator has been granted access to the target. • Control access to the storage through the use of VLANs, CHAP authentication, and ACLs. • In active/active multipath environments, distribute ownership of the LUNs between the two MSA controllers. Choose one of the following: • Automatic load balancing (default)-MSA firmware initially assigns ownership of all LUNs to one of the two MSA controllers, and then automatically reassigns LUN ownership evenly between the controllers based on I/O loads of the LUNs. • Manual load balancing-Through the SMU or CLI, indicate the preferred path (controller ownership) for each LUN. • Draw physical and logical diagrams of your network. • Hardware/Device diagram-Physical layout of the entire network, including device names and cabling. • Storage diagram-Hard drive and storage system arrangement and configuration, including RAID levels. • Path/Accessibility diagram-Access information, including which devices are allowed to communicate with each other. Preparing the site To ensure continuous, safe, and reliable operation of your equipment, place your system in an approved environment with adequate physical space, ventilation, and power. • "Providing structural support for the floor" on page 36 • "Providing clearance space and ventilation" on page 37 • "Providing power sources" on page 37 • "Chassis specifications" on page 38 In addition to the following discussion, see for a detailed list of MSA1510i specifications. Providing structural support for the floor Calculate the total weight of your equipment and verify that your site can support the weight. For HP ProLiant server environments, consider using Rack Builder, a software tool that provides a simplified method to planning and configuring racks and rack-mountable products. Rack Builder is available on the Options tab of the ProLiant Home page of the HP servers website at http://www.hp.com/country/us/eng/prodserv/servers.html. 36 Installation