Configuring a Storage Array 55For optimal performance in a multi-user database or file system storageenvironment, set the segment size to minimize the number of physical disksneeded to satisfy an I/O request. Using a single physical disk for a single requestleaves other physical disks available to simultaneously service other requests.After you have finished creating the disk groups and virtual disks by using theautoConfigure storageArray command, you can further define the propertiesof the virtual disks in a configuration using the set virtualDisk command.(See "Modifying Your Configuration" on page 55.)Example of the Auto Configuration Commandclient>smcli 123.45.67.89 -c "autoConfigurestorageArray physicalDiskType=SAS raidLevel=5diskGroupWidth=8 diskGroupCount=3virtualDisksPerGroupCount=4 hotSpareCount=2segmentSize=8;"The command in this example creates a storage array configuration that usesSAS physical disks set to RAID level 5. Three disk groups are created. Each diskgroup consists of eight physical disks configured into four virtual disks. Thestorage array has two hot spares, and segment size for each virtual disk is 8 KB.Modifying Your ConfigurationAfter creating your initial configuration, modify the properties of theconfiguration to ensure that it meets your requirements for data storage. Usethe following commands to modify the properties of your configuration:• autoConfigure storageArray• create virtualDiskUse the set commands to modify a storage array configuration. This sectionexplains how to modify the following properties:• Storage array password• Simple Mail Transport Protocol (SMTP) and Simple NetworkManagement Protocol (SNMP) alerts• RAID controller module clocks• Storage array host type• Global hot spares
