HP Smart Array P411 8-port SAS RAID Controller 572531-B21 Online Management, Features, Ports

QuickSpecs

HP Smart Array P411 Controller

Standard Features

Online Management	Online array expansion (with BBWC or FBWC)
Features	Online Advanced Capacity Expansion (with BBWC or FBWC and Smart Array Advanced Pack upgrade)
	Online logical drive extension (with BBWC or FBWC)
	Online RAID Level Migration (with BBWC or FBWC)
	Online Stripe Size Migration (with BBWC or FBWC)
	Offline Mirror splitting and recombining (with BBWC or FBWC and Smart Array Advanced Pack
	upgrade)
	Unlimited global online spare assignment
	User selectable expand and rebuild priority
	User selectable RAID level and stripe size
	User selectable read and write cache size ratio
Ports	Eight (8) SAS physical links distributed across 2 external x4 miniSAS connectors.
Performance	HP's High Performance Architecture sets new boundaries of industry performance expectations!
	6Gb/s SAS (600MB/s bandwidth per physical link)
	8x 6Gb/s SAS physical links (compatible with 3Gb/s SATA)
	256MB 40-bit wide DDR2-800MHz cache upgradeable to 512MB 72-bit wide DDR2-800MHz battery-
	backed write cache or 512MB / 1G 72-bitwide DDR2 flash backed write cache provides up to 4.2 GB/s
	maximum bandwidth
	Write-back caching (with BBWC or FBWC)

Native Command Queuing Native Command Queuing (NCQ) is a technology designed to increase performance of SATA hard disk drives by allowing the individual hard disk to internally optimize the order in which received read and write commands are executed. This can reduce the amount of unnecessary going back-and-forth on the drive's heads, resulting in increased performance for workloads where multiple simultaneous read/write requests are outstanding, most often occurring in server or storage-type applications. Without NCQ the drive has to process and complete one command at a time. For NCQ to be enabled, it must be supported and turned on in the controller and in the hard drive itself.

NOTE: Please see the SATA Hard Drive QuickSpecs for specific SATA hard drive capacities that support NCQ: http://h18000.www1.hp.com/products/quickspecs/11940_div/11940_div.html

DA - 13202 Worldwide — Version 25 — November 1, 2013 Page 4