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QuickSpecs
Standard Features
Management Features
Ports
Performance
Native Command Queuing Native Command Queuing (NCQ) is a technology designed to increase performance of SATA hard disk drives
Capacity
Online array expansion (with FBWC)
Online Advanced Capacity Expansion (with FBWC)
Online logical drive extension (with FBWC)
Online RAID level migration (with FBWC)
Online stripe size migration (with FBWC)
Online mirror split, recombine and rollback (with FBWC )
Unlimited global online spare assignment
User selectable expand and rebuild priority
User selectable RAID level and stripe size
User selectable read and write cache sizes
Supports Predictive Spare Activation
Eight (8) SAS physical links distributed across 2 internal x4 wide port connectors.
6Gb/s SAS [(600MB/s bandwidth per physical link)]
x8 6Gb/s SAS physical links (compatible with 3Gb/s SATA )
512 MB 72-bit wide DDR3-800MHz Flash Backed Write Cache, 1 GB 72-bit wide DDR3-1333MHz
Flash Backed Write Cache or 2GB 72-bit wide DDR3-1333MHz Flash Back Write Cache provides up to
10.6 GB/s maximum bandwidth (on the DDR3-1333MHz cache)
x8 PCIe 3.0 host interface provides maximum bandwidth
Read ahead caching
Write-back caching (with FBWC)
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_na/11940_na.html
Given the increasing need for high performance and rapid capacity expansion, the SA-P420 Controller
offers:
Up to 240TB of total internal storage with 60 x 4TB LFF SATA hard drives
Up to 24TB of total internal storage 900GB SFF SAS hard drives
Above stated total internal storage LFF is based on the HP SL4540 Gen8 server. Maximum internal storage
is dependent on the server.
DA - 14228 North America — Version 13 — September 13, 2013
HP Smart Array P420 Controller
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