HP 381513-B21 - Smart Array P800 Controller RAID Manuals

Configuring Arrays on HP Smart Array Controllers Reference Guide Part Number 433572-005 November 2009 (Fifth Edition)

HP Smart Array Controller technology technology brief, 3rd edition 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-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

Redundancy in enterprise storage networks using dual-domain SAS configurations technology brief Abstract.............................................................................................................................................. 2 Introduction......................................................................................................................................... 2 Why dual-domain SAS is important ....................................................................................................... 2 Single SAS domain .......................................................................................................................... 3 Dual-domain SAS............................................................................................................................. 4 Examples of redundant architectures using serial storage.......................................................................... 5 Dual-domain SAS............................................................................................................................. 5 Dual-domain SAS: servers in two-node cluster...................................................................................... 6 HP dual-path with cascaded JBODs.................................................................................................... 7 Summary ............................................................................................................................................ 8 Appendix A: Nomenclature and definitions ............................................................................................ 9 Dual-path .................................................................................................................................... 9 Dual-port ..................................................................................................................................... 9 JBOD .......................................................................................................................................... 9 Multiple SCSI domains.................................................................................................................. 9 Port Identifier ............................................................................................................................... 9 phy........................................................................................................................................... 10 SAS domain .............................................................................................................................. 10 SCSI domain.............................................................................................................................. 10 SCSI initiator.............................................................................................................................. 10 SCSI initiator port....................................................................................................................... 10 SCSI target port ......................................................................................................................... 10 Appendix B: Enabling technology........................................................................................................ 11 SAS and SATA technology.............................................................................................................. 11 Connectors ................................................................................................................................ 12 Backplane ................................................................................................................................. 13 Devices......................................................................................................................................... 13 Drives and controllers ................................................................................................................. 13 Expander .................................................................................................................................. 13 Cluster Interconnect .................................................................................................................... 13 Firmware and Software .................................................................................................................. 14 Serial Tunneling Protocol (STP) ..................................................................................................... 14 SPC-3 Target port group commands ............................................................................................. 14 For more information.......................................................................................................................... 15 Call to action .................................................................................................................................... 15

RAID 6 with HP Advanced Data Guarding technology: a cost-effective, fault-tolerant solution technology brief Abstract.............................................................................................................................................. 2 Introduction......................................................................................................................................... 2 Functions and limitations of RAID schemes .............................................................................................. 3 Fault tolerance of RAID schemes ............................................................................................................ 5 Cost-effectiveness of RAID schemes ........................................................................................................ 7 Performance of RAID schemes ............................................................................................................... 8 Choosing a RAID level ......................................................................................................................... 9 Summary ............................................................................................................................................ 9 Call to action .................................................................................................................................... 10

HP Smart Array P800 Controller for HP ProLiant Servers User Guide Part Number 432600-002 August 2007 (Second Edition)

HP Smart Array Controllers for HP Integrity Servers User Guide Part Number 469987-002 March 2009 (Second Edition)

Serial ATA technology technology brief, 2nd edition Introduction......................................................................................................................................... 2 Parallel ATA technology ....................................................................................................................... 2 Serial ATA technology.......................................................................................................................... 3 Low voltage differential signaling....................................................................................................... 4 Signal integrity ................................................................................................................................ 4 SATA Performance ........................................................................................................................... 5 SATA 1.5 Gb/s ........................................................................................................................... 5 SATA 1.5 Gb/s (with extensions) ................................................................................................... 5 SATA 3.0-Gb/s............................................................................................................................ 5 SATA devices .................................................................................................................................. 5 Cabling and connector ................................................................................................................. 6 Initiators ...................................................................................................................................... 6 Port multipliers ............................................................................................................................. 7 Targets........................................................................................................................................ 7 SATA/SAS interoperability................................................................................................................ 7 SATA topologies.................................................................................................................................. 8 Internal ........................................................................................................................................... 8 External .......................................................................................................................................... 8 Conclusion.......................................................................................................................................... 9 For more information.......................................................................................................................... 10 Call to action .................................................................................................................................... 10