HP 381513-B21 HP Smart Array Controller technology, 3rd edition
HP 381513-B21 - Smart Array P800 Controller RAID Manual
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- HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 1
HP Smart Array Controller technology technology brief, 3rd edition Abstract...3 Introduction...3 Storage trends...3 Meeting data storage requirements...4 High performance...4 PCI Express technology...4 SAS/SATA technology ...5 SAS-2 standard ...6 Mini SAS 4x cable connectors and receptacles 7 High- - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 2
cache 23 Entry level RAID solutions ...23 Software RAID ...23 Zero Memory RAID...23 Storage support and pathway redundancy 24 Solid state drives...24 Native Command Queuing ...24 Dual Domain support...24 Tape device support ...25 Smart Array Advanced Pack ...25 Storage management ...26 Array - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 3
between servers and external storage enclosures, and between models of Smart Array controllers. For complete Smart Array controller compatibility and support information, see www.hp.com/products/smartarray Storage trends Four key trends influence network storage requirements today: • Application - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 4
/products/storage/software/sanvr/index.html High performance Smart Array controllers offer exceptional performance and reliability characteristics, with support for traditional parallel Small Computer System Interface (SCSI) technology, as well as the latest SAS and SATA technology and advanced RAID - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 5
controllers can manage both SAS arrays and SATA arrays. Smart Array configuration utilities help administrators configure arrays correctly so that data remains available and reliable. 1 For more information about SAS technology, refer to the HP technology brief titled "Serial Attached SCSI storage - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 6
with past generation SATA & SAS devices. The Smart Array P700m controller supports SAS-2 zoning capabilities. SAS-2 zoning uses a shared SAS fabric to assign multiple servers to multiple storage devices within a rack. HP presently employs SAS-2 zoning in the HP 3Gb SAS BL Switch & MDS600 drive - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 7
) are replacing SAS 4x connectors and receptacles. For more detailed information on SAS technology and SAS-2 zoning, refer to the Serial Attached SCSI storage technology brief: http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01613420/c01613420.pdf High-performance processor HP Smart Array - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 8
overcomes the problem with some array controllers in the industry today that use fixed read-ahead schemes to increase sequential read performance but degrade random read performance. Write-back caching HP Smart Array controllers also use a caching scheme that allows host applications to continue - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 9
for write-back and read-ahead operations. Administrators can configure the cache module for optimal performance for any storage need. The default setting for most present generation Smart Array controllers configures the cache for 75 percent write-back operations and 25 percent read-ahead - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 10
offer basic support for RAID 0, RAID 1, and RAID 5 disks (called software RAID) to create and manage logical drives that do not contain the operating system. Software RAID requires a significant amount of the server's resources to perform management functions. However, Smart Array controllers use - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 11
performance gains are largely due to bandwidth differences between 3Gb SAS PCI Gen 1 and 6Gb SAS PCIe-2. Figure 3. Maximum sequential read/write performance for the Smart Array P800 and P411 controllers in a RAID 0 environment RAID-0, Maximum performance 2500 2000 1500 1000 500 0 4KB SEQ READ - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 12
G6 P800, 512MB, fw:7.00, RAID 5 (256KB), MSA70, 14-146GB SFF 3Gb SAS 15K, DL380-G5 512KB SEQ WRITE Again, the RAID 6 maximum sequential read/write performance test results shown in Figure 5 indicate significant performance gains for the Smart Array P411 over the previous-generation P800 controller - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 13
Test specifications P411 P800 Firmware Memory Driver Internal disk drives External storage Drives v2.50 512 MB HP Smart Array Controller Driver HpCISSs2 (6.18.0.32 b14) RAID 0,5,6 (256KB) 1 logical drive v7.00 512 MB HP Smart Array Controller Driver HpCISSs2 (6.14.0.32 b25), RAID 0,5,6 (256 KB - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 14
. RAID support In 1989, HP (then Compaq) was the first company to introduce RAID subsystems in the network server marketplace. Today, RAID is an industry-standard technology and most online network data storage is protected with some level of RAID. Smart Array controllers support RAID levels - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 15
. Users should consult the controller user guide for more details. RAID migration Using the ACU, administrators can also change the RAID level of the logical drive without downtime. Administrators can perform RAID migration to increase raw data storage capacity, improve performance by increasing - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 16
new firmware image, administrators can download an updated HDD firmware image to the supported Smart Array controller and update all of the HDDs the next time the server is rebooted. This greatly reduces the time involved in updating disk drive firmware. Recovery ROM HP Smart Array controllers store - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 17
of drive failures. The drive parameter tracking feature allows Smart Array controllers to warn of potential drive problems before they occur. HP drives that fail to meet the expected criteria may be eligible for replacement under the HP Pre-Failure Warranty. Automatic data recovery with rapid - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 18
also to correct them. Data errors could originate inside the DRAM chip or across the memory bus. Battery-backed write cache HP Smart Array controllers ensure that data is protected in a location isolated from server failures before acknowledging that the data transfer has completed. The write-back - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 19
server board so that the controller type and drive bays are the same. The cache module, battery pack, and drives must be moved to the replacement system to extract the data from the battery-backed cache. Selection criteria for battery-backed cache HP Smart Array battery cells, battery enclosures - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 20
about Smart Array controller battery configuration and specifications download the "HP Smart Array Controllers for HP ProLiant Servers User Guide": http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01608507/c01608507.pdf?ju mpid=reg_R1002_USEN Flash-backed write cache HP introduced - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 21
hour battery life limitation and the data will be posted to the disk drive on the next power up. FBWC architecture The FBWC DDR2 mini-DIMM cache module is specifically designed for the present generation of PCIe2.0, SAS-based Smart Array controllers based on the PMC PM8011 max SAS SRC 8x6G RAID on - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 22
the data rate is 266 Mbps. The FBWC module connects to the Smart Array controller through a 244-pin mini-DIMM connector. At the time of publication, the FBWC cache is supported on the Smart Array 410i with support for other present generation Smart Array controllers to follow in the first quarter of - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 23
drives to a Smart Array controller in a seamless procedure that maintains the user data and RAID configuration. The ProLiant DL320 G6 server supports the B110i. For a listing of the complete feature set and support information for the B110i SATA Software RAID, download the B110i user guide at http - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 24
HP Smart Array firmware v5.10 or higher and dual-port SAS drives. Dual Domain supports Multi-Initiator JBOD Clusters. I/O Module Option with the HP SC44Ge Host Bus Adapter supports HP-UX and OpenVMS on select HP Integrity servers only. Dual Domain is also supported by HP Serviceguard software on HP - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 25
device support Smart Array controllers support tape back-up devices. The One Button Disaster Recovery (OBDR) ProLiant server/controller compatibility matrix for currently shipping HP products is available at www.hp.com/go/obdr. Smart Array Advanced Pack HP Smart Array Advanced Pack (SAAP) firmware - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 26
integrated with ACU and HPACUCLI. For more information about storage management and using these utilities, see the "Configuring Arrays on HP Smart Array Controllers Reference Guide," available at http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00729544/c00729544.pdf Table 6 summarizes the - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 27
Smart Array controllers. The ACU is also supported on the HP MSA family of entry-level SAN products. This provides administrators with a seamless set of tools to use with both HP Smart Array direct-attached storage (DAS) and HP SAN-attached storage. The ACU runs online on Microsoft® Windows® Server - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 28
a full report for administrators to fax or e-mail to HP customer service for phone support. Summary HP Smart Array controllers are powerful I/O solutions for today's most demanding network data storage requirements. Smart Array controller technology combines an advanced feature set and fullspectrum - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 29
The Smart Array controller family includes a standard toolset that administrators can use to configure array controllers, expand an existing array configuration by adding disk drives, or reconfigure an array by extending logical drive sizes. Before this innovation, expanding the storage capacity - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 30
array expansion. During idle time, when no I/O commands are active, the array drive creation Once the array capacity is expanded, "Logical drive extension" section). Figure A2. After array expansion, the administrator can use the free space by logical drive after array expansion. Logical drive extension - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 31
A3). During this process, an administrator adds new storage space to an existing logical drive on the same array. An administrator may have gained this new storage space either by array expansion or by deleting another logical drive on the same array. Figure A3. Logical drive extension grows the - HP 381513-B21 | HP Smart Array Controller technology, 3rd edition - Page 32
Web address Smart Array controllers HP disk disk drive products HP Modular Smart Array external storage systems HP ProLiant servers HP SAS Technology Configuring Arrays on HP Smart Array Controllers Reference Guide Smart Array Advanced Pack www.hp.com/products/smartarray www.hp.com/products
HP Smart Array Controller technology
technology brief, 3
rd
edition
HP Smart Array Controller technology
technology brief, 3
rd
edition
Abstract
..............................................................................................................................................
3
Introduction
.........................................................................................................................................
3
Storage trends
.....................................................................................................................................
3
Meeting data storage requirements
........................................................................................................
4
High performance
................................................................................................................................
4
PCI Express technology
.....................................................................................................................
4
SAS/SATA technology
.....................................................................................................................
5
SAS-2 standard
............................................................................................................................
6
Mini SAS 4x cable connectors and receptacles
................................................................................
7
High-performance processor
..............................................................................................................
7
Cache module benefits
.....................................................................................................................
8
Read-ahead caching
.....................................................................................................................
8
Write-back caching
......................................................................................................................
8
Balanced cache size
.....................................................................................................................
9
RAID performance enhancements
.......................................................................................................
9
Disk striping
.................................................................................................................................
9
Parity data
...................................................................................................................................
9
Background RAID creation
.............................................................................................................
9
RAID 5 and RAID 6 read-modify-write
.............................................................................................
9
Striping across arrays
.................................................................................................................
10
RAID 1 load balancing
...............................................................................................................
10
Hardware versus software RAID
...................................................................................................
10
Smart Array performance
................................................................................................................
11
Data availability
................................................................................................................................
14
RAID support
.................................................................................................................................
14
Stripe size migration
...................................................................................................................
14
RAID migration
..........................................................................................................................
15
Drive roaming
...............................................................................................................................
16
Mirror splitting and recombining
......................................................................................................
16
Online drive flash
..........................................................................................................................
16
Recovery ROM
..............................................................................................................................
16
Pre-Failure Warranty using S.M.A.R.T technology
..............................................................................
16
Automatic data recovery with rapid rebuild technology
......................................................................
17
Online spare
.................................................................................................................................
17
Dynamic sector repair
....................................................................................................................
18
ECC protection
..............................................................................................................................
18
Battery-backed write cache
.............................................................................................................
18