Introducing the 3ware® SAS/SATA RAID Controller16 3ware SAS/SATA RAID Software User Guide, Version 9.5.1• 3ware CLI (Command Line Interface)The 3ware CLI provides the functionality available in 3DM through aCommand Line Interface. You can view unit status and versioninformation and perform maintenance functions such as adding orremoving drives, and reconfiguring RAID units online. You can also useit to remotely administer controllers in a system.The 3ware CLI is described in 3ware SAS/SATA RAID Controller CLIGuide and in the 3ware HTML Bookshelf.Monitoring, Maintenance, andTroubleshooting FeaturesSeveral 3ware RAID controller features aid in monitoring andtroubleshooting your drives.• Drive Performance Monitoring (DPM). DPM is an advanced trouble-shooting tool used to measure drive performance, and to help identifywhen a specific drive is causing problems so that you can repair or replaceit. Commands are available through the 3ware CLI to enable and disableDPM, and to see a range of different statistics. These statistics can beuseful to AMCC technical support to help you troubleshoot problemswith your RAID controller and units. For more information, see “DrivePerformance Monitoring” on page 253.• SMART Monitoring (Self-Monitoring, Analysis and ReportingTechnology) automatically checks a disk drive's health every 24 hoursand reports potential problems. This allows you to take proactive steps toprevent impending disk crashes. SMART data is checked on all diskdrives (array members, single disks, and hot spares). Monitoring ofSMART thresholds can be turned on and off in 3DM. See, “SelectingSelf-tests to be Performed” on page 178 This feature does not apply toSAS drives. (For details, see “Viewing SMART Data About a Drive” onpage 157.)• Staggered Spinup allows drives that support this feature to be powered-up into the standby power management state to minimize in-rush currentat power-up and to allow the controller to sequence the spin-up of drives.Both SATAII OOB and ATA spin-up methods are supported. The standbypower management state is persistent after power-down and power-up.You can set the number of drives that will spin up at the same time, andthe time between staggers in 3BM (the 3ware BIOS Management utility).This feature does not apply to drives that are attached to an expander. Fordetails, see “Enabling and Setting Up Staggered Spin-up” on page 95.
