HP 273914-B21 HP Smart Array Controller technology, 3rd edition
HP 273914-B21 - Smart Array 6404/256 RAID Controller Manual
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- HP 273914-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 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 - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 2
drives...24 Native Command Queuing ...24 Dual Domain support...24 Tape device support ...25 Smart Array Advanced Pack ...25 Storage management ...26 Array Configuration Utility ...27 Option ROM Configuration for Arrays 27 CPQONLIN...27 HP Systems Insight Manager ...27 Performance monitoring ...28 - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 3
can move data 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 - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 4
. More information on HP storage virtualization products and services are available at http://h18006.www1.hp.com/products/storage/software/sanvr/index.html High performance Smart Array controllers offer exceptional performance and reliability characteristics, with support for traditional parallel - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 5
locate and fix disk failures. More importantly, SAS architecture solves the parallel SCSI problems of clock skew and signal degradation at higher signaling rates.1 The same Smart Array controllers are compatible with Serial Advanced Technology Attachment (SATA) technology and include the following - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 6
assigned to any server within the cClass enclosure.3 For an up-to-date listing of HP Smart Array controllers that support the SAS-2 specification, see the Smart Array controller matrix: www.hp.com/products/smartarray 2 Serial Attached SCSI-2 (SAS-2) is an American National Standards Institute (ANSI - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 7
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 controllers use a variety of high-performance processors for managing the RAID system. The Power PC - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 8
Array controller technology 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 - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 9
. 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 operations, but these default settings can vary - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 10
drives. RAID 6 and 60 are available as an option with the Smart Array Advanced Pack (see section later in this paper) and are not supported on all HP Smart Array controllers. RAID 1 load balancing In general, the same stripe and array sizes, RAID 0, RAID 5, and RAID 6, have the same read performance - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 11
generation P800. The charts in Figures 3, 4, and 5 compare the maximum performance for each Smart Array controller across the queue depth in each data range. The same queue depth (1, 2, 4, 8, 16, 32, 64, 128, 256) and stripe size (256 KB) was used for all testing. It should be noted that the two - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 12
shown in Figure 4 indicate significant performance gains for the Smart Array P411 over the previous generation P800 controller. Figure 4. Maximum sequential read/write performance for the Smart Array P800 and P411 controllers in a RAID 5 environment RAID-5, Maximum performance 2500 2000 1500 - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 13
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) 1 logical drive D2700 14-15K SFF SAS DP Seagate - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 14
without interrupting user access. Smart Array controllers can monitor I/O activity, track key parameters, predict potential problems, take corrective actions, provide automatic recovery, and deliver full fault management to protect against downtime. RAID support In 1989, HP (then Compaq) was the - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 15
RAID 1+0 NOTE: Different controllers may have different stripe sizes. Users should consult the controller user guide for more details. RAID no online spares. HP recommends not exceeding these maximum figures (excluding any allowable online spares) when configuring a drive array due to the - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 16
Drive roaming HP Smart Array controllers support drive roaming, which allows administrators to move disk drives and arrays while maintaining data availability. Drive roaming allows administrators to move one or more disk drives that are members of a configured logical drive to a different bay - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 17
the years, as S.M.A.R.T. matured, HP used both M&P and S.M.A.R.T. to support disk drive failure prediction technology for problem before failure occurs. HP Smart Array controllers recognize S.M.A.R.T. error codes and notify HP Systems Insight Manager5 (SIM) whenever a potential problem arises. HP - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 18
, but 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 - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 19
while data is held in cache. For detailed technical information on all HP cache options and controller compatibility, go to www.hp.com/products/smartarray. Types of batteries HP Smart Array controllers use rechargeable Nickel Metal Hydride (NiMH) button cell batteries specifically designed for - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 20
is necessary. Battery replacement HP Smart Array controllers include serviceable battery packs that allow tool 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 - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 21
power during a power loss. The FBWC offers significant advantages over the HP Battery-backed write-cache (BBWC) system. Since the FBWC writes the 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 a - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 22
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 and housing as the HP 650 mAh P-Series battery used in the HP BBWC. Capturing data during - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 23
does not include ZMR on the external connector. Modular Smart Array (MSA) products are not supported in ZMR mode. NOTE: The P212 controller can only be upgraded to 256 MB BBWC, so it does not support 512 MB BBWC. NOTE: Smart Array Advanced Pack is not available on Zero Memory configurations - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 24
, Native Command Queuing and Dual Domain providing increased performance and redundancy on the storage network. Smart Array controllers continue to support tape back up devices. Solid state drives HP has introduced the second generation of solid state drives (SSD) for ProLiant servers. These solid - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 25
Tape 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) - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 26
. 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 capabilities of ACU, ORCA, and - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 27
No No No No No Yes CPQONLIN Yes Yes Yes Yes Yes No Array Configuration Utility The ACU7 is a browser-based graphical application that helps configure Smart Array controllers. The ACU is also supported on the HP MSA family of entry-level SAN products. This provides administrators with a seamless - HP 273914-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 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 29
Appendix A: Capacity growth technologies 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 - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 30
drive (Figure A2) or to extend the size of an existing logical drive (described in the "Logical drive extension" section). Figure A2. After array expansion, the administrator can use the free space by creating a new logical drive. For example, if every department in a company has its own logical - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 31
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 size of a logical drive. The - HP 273914-B21 | HP Smart Array Controller technology, 3rd edition - Page 32
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/harddiskdrives www.hp.com/go/msa www.hp.com/go/proliant www.hp.com/go/serial http://h20000.www2.hp.com/bc/docs/support
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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