HP X1800sb Serial Attached SCSI technology, 3rd edition

HP X1800sb Manual

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  • HP X1800sb | Serial Attached SCSI technology, 3rd edition - Page 1
    SAS-2 ...6 SAS-2.1 ...6 SAS/SATA interoperability ...8 SAS topologies...8 Zoning ...13 Zoning methodology ...14 Zone management ...14 Zoning advantages in an HP environment 15 Zoning example...16 Cabling and connectors technology ...17 Mini SAS 4x cable connectors and receptacles 17 Mini SAS 8x
  • HP X1800sb | Serial Attached SCSI technology, 3rd edition - Page 2
    ) A protocol used to communicate with SATA drives. A protocol used to communicate with SAS expanders. A protocol used to communicate with SAS drives. Service delivery subsystem Target The part of a SAS system that sends information between a SAS initiator and a SAS target. An end device such as
  • HP X1800sb | Serial Attached SCSI technology, 3rd edition - Page 3
    SAS technology SAS uses a point-to-point architecture that transfers data to and from SCSI storage devices by using serial communication (one bit at a time). The SAS architecture solves the parallel SCSI problems of bus contention, clock skew, and signal degradation at higher signaling rates. SAS
  • HP X1800sb | Serial Attached SCSI technology, 3rd edition - Page 4
    about fail-over redundancy, see the "Redundancy in enterprise storage networks using dual-domain SAS configurations" technology brief listed in the servers with frequent random accesses. HP uses SAS technology to build highly scalable and reliable storage solutions. In enterprise server environments,
  • HP X1800sb | Serial Attached SCSI technology, 3rd edition - Page 5
    Differential signaling reduces the effects of capacitance, inductance, and noise experienced by parallel SCSI at higher speeds. In differential signaling, the positive signal minus the negative signal equals 1500-900 = 600mV or 900-1500 = - 600mV (Figure 2). SAS communication operates in full duplex
  • HP X1800sb | Serial Attached SCSI technology, 3rd edition - Page 6
    negotiated the speed and settings, a training speed negotiation window (Train-SNW) tests the fastest commonly supported speed. SAS-2.1 The SAS-2.1 standard defines active cables, storage power management, and additional connectors (see "Cabling and connectors"). Also, SAS-2.1 splits out the protocol
  • HP X1800sb | Serial Attached SCSI technology, 3rd edition - Page 7
    • Optical cables (6 Gb/s) extend the distance to 100 m. Figure 3. Comparison of untrained SAS 1.1 and trained SAS-2 with active copper and optical cables Storage power management SAS-2.1 devices can turn off SAS physical links when they are idle. Each SAS transceiver consumes about 200 mW. Turning
  • HP X1800sb | Serial Attached SCSI technology, 3rd edition - Page 8
    RAID systems (Figure 4). With this broad range of storage solutions, you can choose storage devices based on reliability, performance, and cost. Figure 4. Examples of solutions available with SAS architecture SAS supports three communication protocols: • Serial Management Protocol (SMP) manages
  • HP X1800sb | Serial Attached SCSI technology, 3rd edition - Page 9
    internal redundant RAID systems using either SAS or SATA drives. Each drive has a point-to-point connection to the controller. The controller can support a maximum of eight drives. In this configuration, the controller disables the external port if more than four drives are connected. Figure 5. Two
  • HP X1800sb | Serial Attached SCSI technology, 3rd edition - Page 10
    Figure 6 shows an alternate topology for RAID systems using an internal port of the SAS controller, an HP SAS Expander Card, and SAS or SATA drives. The full height HP Smart SAS Expander card supports more than eight internal drives on select ProLiant servers when connected to a Smart Array P410 or
  • HP X1800sb | Serial Attached SCSI technology, 3rd edition - Page 11
    one port on a controller to an external storage enclosure. This single controller port incorporates four lanes for a total maximum throughput of 2400 MB/s. The storage enclosure contains an internal 36-port expander that supports cascading an additional enclosure in a 1+1 configuration. Figure
  • HP X1800sb | Serial Attached SCSI technology, 3rd edition - Page 12
    Multi-node clusters A multi-node cluster using SAS provides an alternative to clustered Fibre Channel local loop topologies. This SAS architecture can give you high performance and high availability with no single point of failure. Figure 8 shows a multi-node cluster using a SAS RAID controller.
  • HP X1800sb | Serial Attached SCSI technology, 3rd edition - Page 13
    complex. Zoning can work well in small topologies like server blade enclosures and clustering environments using a common storage blade. This grouping allows access within and between controlled zone groups. A "zoned portion of a service delivery system" (ZPSDS) consists of a group of zoning-enabled
  • HP X1800sb | Serial Attached SCSI technology, 3rd edition - Page 14
    Zoning methodology Zoning uses the unique ID number of each expander PHY to provide a secure method of managing SAS devices. Zoning assigns each port of a zoning expander to a zone group, and any device attached to one of the ports becomes part of that respective zone group. By default, all devices
  • HP X1800sb | Serial Attached SCSI technology, 3rd edition - Page 15
    Zoning advantages in an HP environment In an HP ProLiant environment, the HP Virtual SAS Manager (VSM) configures and manages device zoning. The VSM simplifies the process of performing zoning operations and managing the connected blade systems and storage devices. The VSM assigns zone groups to all
  • HP X1800sb | Serial Attached SCSI technology, 3rd edition - Page 16
    more capacity than an HP StorageWorks SB40c Storage Blade can provide. Zoning can solve this problem. Figure 11 shows how HP BladeSystem enclosure HP StorageWorks MSL2024 SAS Tape Library • Automated backup of blade servers • Remote management • LTO Ultrium tape drive support attached to server blade
  • HP X1800sb | Serial Attached SCSI technology, 3rd edition - Page 17
    Cabling and connectors technology Mini SAS 4x cable connectors and receptacles Mini SAS 4x connectors and receptacles (Figure 12) are replacing SAS 4x connectors and receptacles in new designs. Mini SAS connectors are a small form factor providing better airflow and contain ground pins available for
  • HP X1800sb | Serial Attached SCSI technology, 3rd edition - Page 18
    Figure 14 shows the icons that identify the connectors that attach to an end device, an enclosure "out" port, an enclosure "in" port, and an enclosure universal port. Figure 14. External Mini SAS 4x cable connector icons identify compatible devices and ports Cable connectors and receptacles have
  • HP X1800sb | Serial Attached SCSI technology, 3rd edition - Page 19
    input/output (SGPIO) busses. The Mini SAS 8x HD (external) connectors support both passive and active cables. Conclusion SAS makes it possible to create highly evolve and improve. Using the latest SAS technologies, HP builds highly scalable and reliable solutions for enterprise environments. 19
  • HP X1800sb | Serial Attached SCSI technology, 3rd edition - Page 20
    papers and audio podcasts HP Virtual SAS Manager User Guide Performance factors for HP ProLiant Serial Attached Storage (SAS) technology brief Redundancy in enterprise storage networks using dual-domain SAS configurations technology brie Serial Attached SCSI (SAS) Zoning Overview 6Gb/s SAS: What Is
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Serial Attached SCSI technology
Technology brief, 3
rd
edition
Introduction
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2
SAS terminology
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2
SAS technology
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3
SAS devices
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3
SAS drive performance
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4
Differential signaling
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4
SAS protocol evolution
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6
SAS-1
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6
SAS-2
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6
SAS-2.1
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6
SAS/SATA interoperability
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8
SAS topologies
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8
Zoning
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13
Zoning methodology
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14
Zone management
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14
Zoning advantages in an HP environment
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15
Zoning example
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Cabling and connectors technology
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Mini SAS 4x cable connectors and receptacles
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17
Mini SAS 8x cable connectors
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Conclusion
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For more information
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Call to action
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