HP 615418-B21, P822 Specification
The HP Smart Array P822 Controller is a Full height, 6 Gb/s, PCIe 3.0, Serial Attached SCSI (SAS) RAID controller that provides enterprise
class, second generation storage performance, maximum external scalability, and data protection for select HP ProLiant Gen8 rack
servers and tower servers.
It features two internal and four external SAS ports. Advanced storage functionality, including online RAID level migration with flash
backed write cache (FBWC), global online spare, and pre-failure warning all result in increased server uptime. Data compatibility gives
customers an easy upgrade path to future Smart Array Controllers.
HP Smart Array Advanced Pack 2.0 is included with this controller providing advanced functionality, including features such as RAID 1
ADM (Advanced Data Mirroring), making it easier for customers to protect their data.
What's New
HP SmartCache is base feature of this controller that improves application workload performance by caching hot data to SSDs
Up to 4x better Solid State Disk (SSD) read performance with the SSD Smart Path firmware and driver based feature for Smart
Array controllers
QuickSpecs
HP Smart Array P822 Controller
Overview
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Models
HP Smart Array P822
Controller
HP Smart Array P822/2GB FBWC 2-ports Int/4-ports Ext SAS Controller
615418-B21
QuickSpecs
HP Smart Array P822 Controller
Overview
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The Smart Array
Advantage
HP's innovative design and integration work of the Smart Array family of products creates customer value
that is unmatched in the industry. Use of Smart Array products across multiple applications results in a
much lower Total Cost of Ownership (TCO) than any other server storage RAID product. The HP Smart Array
family brings an unparalleled return on investment through:
Data Compatibility
among all models of Smart Array controllers allows simple and easy upgrades any
time needs for higher performance, capacity, and availability increase. Even successive generations of
Smart Array controllers understand the data format of other Smart Array Controllers.
Consistent Configuration and Management Tools
. All Smart Array products utilize a standard set of
management and utility software. These tools minimize Total Cost of Ownership (TCO) by reducing training
requirements and technical expertise necessary to install and maintain the HP server storage.
Universal Drive
form factors (2.5" and 3.5") are used across multiple HP servers, disk enclosures and
storage systems. With compatibility across many enterprise platforms, you are free to deploy and redeploy these drives to quickly deliver increased storage capacity, migrate data between systems, and
easily manage spare drives.
Smart Carrier
is used across multiple HP Servers. With compatibility across many enterprise platforms,
you are free to deploy and re-deploy these drives to quickly deliver increased storage capacity, migrate
data between systems, and easily manage spare drives.
Pre-Failure Warranty
means HP Insight Manager not only reports when a drive is going to fail but allows
replacement of failing drives prior to actual failure. For complete details, consult the HP Support Center or
refer to your HP Server documentation.
Key Features
Seamless upgrades to and from other HP Smart Array controllers.
Storage interface (SAS/SATA)
Two Mini SAS 4i connectors for attachment to internal drive backplanes
Four Mini SAS 4x connectors for attachment to JBODs and external tape drives
6 Gb/s SAS technology delivers up to 600 MB/s per physical link.
6 Gb/s SATA technology delivers up to 600 MB/s for directly attached SATA drives.
Mix-and-match SAS and SATA drives. Deploy drive technology as needed to fit the computing
environment.
Support for SAS tape drives, SAS tape autoloaders and SAS tape libraries.
Host interface (PCI-e)
PCI-e 3.0 8x host interface provides up to 8 GiB/s in each direction
RAID controller features
2GB flash-backed write cache (not all of which is available for user data)
RAID 0, 1, 1+0, 5, 6, 50, 60, and 1 ADM
Recovery ROM protects against ROM corruption
Smart Array Advanced Pack 2.0 license key included (see below)
The HP SSD Smart Path feature included in the Smart Array software stack improves SSD read
performance by bypassing the Smart Array firmware for the optimal performance path to the SSD.
The HP SmartCache licensed feature (available as an additional option) is a controller-based read
caching solution in a DAS environment that caches the most frequently accessed data ("hot" data)
onto lower latency SSDs to dynamically accelerate application workloads.
Consistent management software among all Smart Array family products, including Array
Configuration Utility (ACU), Systems Insight Manager (SIM), Array Diagnostic Utility (ADU), Online
ROM Configuration Utility (ORCA), and Intelligent Provisioning
SAS 2.0 (6 Gb/s, 3 Gb/s, and 1.5 Gb/s). 6 Gb/s bandwidth supports larger numbers of SAS drives in
the SAS subsystem and provides better support for future high-bandwidth SSDs.
SATA 2.6 (6 Gb/s and 3 Gb/s)
QuickSpecs
HP Smart Array P822 Controller
Standard Features
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24 SAS/SATA physical links distributed across six Mini SAS connectors
Two Mini SAS 4i connectors (8 physical links): for attachment to internal drive backplanes
Four Mini SAS 4x connectors (16 physical links): for attachment to JBODs and external tape
drives
Storage Interface
(SAS/SATA)
PCI-e 3.0 (8 GT/s)
Eight lane mechanical connector
Electrically supports one, four, and eight lanes
Host Interface
(PCI-e)
P822 includes a Sierra SRCv 8x6G SAS RAID-on-chip featuring:
Eight SAS/SATA physical links, each supporting 6 and3 Gb/s for SAS and SATA protocol
Eight PCI-e 3.0 lanes each supporting 8 Gb/s
DDR3-1600 MHz memory controller
High performance MIPS-based multi-processor subsystem
Hardware XOR and Reed-Solomon Engines for RAID 5 and RAID 6 acceleration
RAID Processor and
Expander
The P822 2GB array accelerator features a flash-backed write cache. If the cache DRAM contains data when
power is lost, the data is copied into flash memory of the cache module, drawing power from attached
capacitors. When power is restored, if the flash memory chips contain write data, the data is copied back
into the DRAM so it can be flushed to the drives.
Advantages over battery-backed cache architectures include:
No 72-hour deadline for retrieving the data before the batteries fully discharge
Capacitors charge faster than batteries; controller disables the write cache for only a few minutes
waiting for capacitors to charge rather than a few hours waiting for batteries to charge
No need for periodic battery replacement
No special disposal process
Interface Speeds
P822 supports the latest interface speed
Interface
Maximum bandwidth
*
Notes
PCI-e
8 GiB/s (in each direction)
PCI-e 3.0 (8 lanes at 8 GT/s)
SAS/SATA
14.4GiB/s (in each direction)
SAS-2 (24 physical links at 6 Gb/s)
RAID cache
2 GB/s
DDR3-1600 MHz SDRAM (64-bit data and 8bit ECC)
* Not counting protocol overhead.
QuickSpecs
HP Smart Array P822 Controller
Standard Features
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Native Command Queuing
(NCQ)
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.
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/13021_na/13021_na.html
Dual Domain Support
Dual domain SAS creates redundant pathways for external drives from servers to storage devices. The
redundant paths created by these configurations reduce or eliminate single points of failure within the
storage network. This provides increased levels of high availability with redundant paths from the
controller to the drives. Dual domain SAS implementations make it possible to tolerate host bus adapter
(HBA) or controller failure, external cable failure, expander failure, cable pulls, expander failure and failure
in a spanned disk (JBOD) environments.
Number of Drives
P822 supports up to 227 drives. Examples:
27 internal drives plus eight HP D2700 Disk Enclosures with 25 drives each (227 drives)
27 internal drives plus eight HP D2600 Disk Enclosures with 12 drives each (123 drives)
RAID Levels
RAID 0 (striping)
provides no extra data protection. Data is striped across all drives in the array to
increase performance. RAID 0 requires a minimum of one drive.
RAID 1 (mirroring)
protects against failure of one drive. Data is duplicated on a pair of drives. RAID 1
requires a minimum of two drives. Also see the Advanced Pack Mirror Splitting and Combining
feature.
RAID 1+0 (mirroring and striping)
protects against failure of one drive (and failure of particular
multiple drives). RAID 1+0 is a nested RAID method that uses RAID 0 striping across RAID 1 arrays to
provide performance and protection. RAID 1+0 requires a minimum of four drives. Also see the
Advanced Pack Mirror Splitting and Combining feature.
RAID 5 (distributed data guarding)
protects against failure of one drive. Data protection is provided
by parity data distributed across all the drives. When a physical drive fails, data that was on the
failed drive can be calculated from the remaining parity data and user data on the other drives in the
array. This recovered data is usually written to an online spare drive through a process called a
rebuild. RAID 5 requires a minimum of three drives.
RAID 6 with ADG
(Advanced Data Guarding): This is the highest level of fault tolerance. It allocates
two sets of parity data across drives and allows simultaneous write operations. This level of fault
tolerance can withstand two simultaneous drive failures without downtime or data loss.
QuickSpecs
HP Smart Array P822 Controller
Standard Features
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RAID 50 (RAID 5+0)
protects against failure of one drive (and failure of particular multiple drives).
RAID 50 is a nested RAID method that uses RAID 0 striping across RAID 5 arrays. RAID 50 tolerates
one drive failure in each spanned array without loss of data. RAID 50 requires less rebuild time than
single RAID 5 arrays RAID 50 requires a minimum of six drives.
RAID 60 (RAID 6+0)
allows administrators to split the RAID 6 storage across multiple external
boxes. RAID 60 requires a minimum of eight drives. RAID 60 is a nested RAID method that uses RAID
0 block-level striping across multiple RAID 6 arrays with dual distributed parity. With the inclusion of
dual parity, RAID 60 will tolerate the failure of two disks in each spanned array without loss of data.
RAID 1 ADM (Advanced Data Mirroring)
allows customers to create mirrored RAID set using 3
identical hard drives. This provides customers with a 2nd "live spare" for RAID 1(+0) configurations.
This allows customers to rebuild a failed drive in a RAID 1(+0) set without the array entering into a
degraded state.
Online Management
Features
Online Capacity Expansion (increase array size feature)
Advanced Capacity Expansion (shrink array and move array features)
Online RAID Level Migration (change the fault tolerance level of a configured logical drive)
Online Stripe Size Migration (change the stripe size of a configured logical drive)
Online Spares (provide automatic drive replace for a failed drive in RAID levels other than RAID 0)
User Selectable Expand and Rebuild Priority (select the priority of rebuilding data from a failed drive
over current requests from the operating system)
User Selectable Stripe Size
User Selectable Read and Write Cache Sizes
Logical Drive Extension (increase logical drive size without disturbing data)
User Selectable Surface Scan idle interval (control the background process that scans drives for bad
sectors, and verify the consistency of RAID 5 and RAID 6 parity data)
Physical Drive Write Cache control (enable drive write cache for applications like video editing that
that can tolerate data loss, and/or systems that have redundant and uninterruptible power supplies)
Availability
Provides increased server uptime by providing advanced storage functionality:
Online RAID Level Migration (between any RAID level)
Online Capacity Expansion
Logical Drive Capacity Extension
Global Online Spare
Pre-Failure Warranty
QuickSpecs
HP Smart Array P822 Controller
Standard Features
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