Nexsan UNITY5000, UNITY6000, UNITY6000MC Hardware Reference Manual

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UNIFIED HYBRID STORAGE

Nexsan Unity

UNITY5000 Hardware Reference Guide

Firmware Version: Unity1.4

Nexsan 900 E. Campbell, CA 95008 | p. 866.263.9726 | www.nexsan.com

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Trademarks

Nexsan® is a trademark or registered trademark of Nexsan, Inc.. The Nexsan logo isa registered trademark of Nexsan, Inc..

Allother trademarks and registered trademarks are the property of their respective owners.

Patents

This pr oduct is protected byone or more of the following patents, and other pending patent applicationsworldwide:

United Statespatents US8,191,841, US8,120,922;

United Kingdom patents GB2466535B, GB2467622B, GB2467404B, GB2296798B, GB2297636B

Regulatory Compliance

United States Statement for FCC: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense. Electromagnetic Emissions: FCC Class A, EN 55022 Class A, EN 61000-3-2/-3-3, CISPR 22 Class A, ICES-003 Electromagnetic Immunity: EN 55024/CISPR 24, (EN 61000-4-2, EN 61000-4-3, EN 61000-4-4, EN 61000-4-5, EN 61000-4-6, EN61000-4-8, EN61000-4-11)

Safety: CSA/EN/IEC/UL 60950-1 Compliant, UL or CSA Listed (USA and Canada), CE Marking (Europe) RoHS: RoHS2 (Global) Other international regulatory compliance: KCC (South Korea), VCC(Japan) California Best Management Practices Regulations for Perchlorate Materials: This Perchlorate warning applies only to products containing CR (Manganese Dioxide) Lithium coin cells. Perchlorate Material-special handling may apply. See www.dtsc.ca.gov/hazardouswaste/perchlorate.

About This Document

Unauthorized use, duplication, or modification of this document in whole or in part without the written consent of Nexsan Corporation is strictly prohibited. Nexsan, Inc. reserves the right to make changes to this manual, as well as the equipment and software described in this manual, at any time without notice. This manual may contain links to web sites that were current at the time of publication, but have since been moved or become inactive. It may also contain links to sites owned and operated by third parties. Nexsan is not responsible for the content of any such third-party site.

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Contents

About this manual iv

Audience iv Conventions iv

Text iv

Notes, Tips, Cautions, and Warnings iv Contacting Nexsan v Related documentation vi

Nexsan UNITY vi

Nexsan E-Series vi

Safety notices vii

Chapter 1: UNITY5000 hardware 1

UNITY5000 Front and rear views 2 UNITY5000 Front panel LEDs 3

Control panel LEDs 3

Drive carrier LEDs 4 UNITY5000 General specifications 5

Glossary 6

Index 17

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Contents

About this manual

This Hardware Reference Guide provides hardware information for the following platforms. For installation procedures, please refer to the appropriate Quick Start Guide.

Nexsan UNITY5000™

Audience

This guide has been prepared for the following audience:

IT system administrators

Engineers

Technicians

Conventions

Text

Cross-references (both internal and to the titles of other documents), hyperlinks, URLs, and email addresses are displayed in underlined blue.

Text that refers to labels on the physical unit or interactive items in the graphical user interface (GUI) is in boldface.

Text that is displayed in the command-line interface (CLI) or text that refers to file or directory names is in monospace.

Text strings that must be entered by the user in the command-line interface or in text fields in the graphical user interface (GUI) is in monospace bold.

System messages and non-interactive items in the graphical user interface (GUI) are in italic.

References to Software User Guides are in italic.

Notes, Tips, Cautions, and Warnings

Note Notes contain important information, present alternative procedures, or call attention to certain items.

Tip Tips contain handy information for end-users, such as other ways to perform an action.

CAUTION: In hardware manuals, cautions alert the user to items or situations which may cause

damage to the unit or result in mild injury to the user, or both. In software manuals, cautions alerts the user to situations which may cause data corruption or data loss.

WARNING: Warnings alert the user to items or situations which may result in severe injury or death to the user.

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Contents

Contacting Nexsan

Nexsan Head quarters

900 EHamilton Ave, Suite 230

Campbell, CA 95008 USA

Support (US): +1 866-463- 9726

Support (Worldwide): +1 760-690-1111

E-mail: [email protected]

Nexsan Ship pin g

302 Enterprise Street , Suite A

Escondido, CA 92029 USA

Nexsan Canada

1405 Trans Canada Highway, Suite 300

Dorval, QC H9P2V9 Canada

Support (Canada): +1 866-463-9726

Nexsan UK

Units 33–35, Par ker Centre, Mansfield Road

Derby, DE21 4SZ United Kingdom

Support (Europe): +44 (0)1332 291600

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Contents

Related documentation

The following Nexsan product manuals contain related information.

Nexsan UNITY

Nexsan UNITY2000CTMQuick Start Guide

Nexsan UNITY2000PTMQuick Start Guide

Nexsan UNITY4000™ Quick Start Guide

Nexsan UNITY5000™ Quick Start Guide

Nexsan UNITY6000™Quick Start Guide

Nexsan UNITY224X™ Quick Start Guide

Nexsan UNITY2000XCTMQuick Start Guide

Nexsan UNITY2000XPTMQuick Start Guide

Nexsan Unity Hardware Reference Guide

Nexsan Unity Hardware Maintenance Guide

Nexsan Unity Software User Guide

Nexsan Unity nxadmin Command-line Interface Reference Guide

Nexsan Unity nxcmd Command-line Interface Reference Guide

Nexsan Unity Snapshots and Replication Guide

Nexsan Unity Expander Unit Reference Guide

Nexsan Unity VMware Best Practices Guide

Nexsan Unity NFS Interoperability

Nexsan Unity Networking Best Practices Guide

Nexsan E-Series

Nexsan E-Series E18™/E18X™ Quick Start Guide

Nexsan E-Series E18™/E18V™ Installation and Maintenance Manual

Nexsan E-Series E18X™/E18XV™ Installation and Maintenance Manual

Nexsan E-Series E60™/E48™/E60X™/E48X™ Quick Start Guide

Nexsan E-Series E60™/E60V™/E60VT™/E48™/E48V™/E48VT™ Installation and Maintenance Manual

Nexsan E-Series E60X™/E60XV™/E48X™/E48XV™ Installation and Maintenance Manual

Nexsan E-Series E32V™ Installation Guide

Nexsan E-Series E32V™ FRU Removal and Replacement Guide

Nexsan E-Series RAID Storage User Manual

Nexsan E-Series Snapshots and Replication Software User Guide

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Contents

Safety notices

Always observe the following precautions to reduce the risk of injury and equipment damage:

Computer components and disk drives are sensitive to static discharge. Take precautions to discharge any electrostatic charge from your person before and while handling components with your hands or any tools. Use an anti-static wrist-strap.

The system only be installed in a clean, dry environment. The operating temperature is 10º to 35º C (50º to 95º F), with operating relative humidity at 20 to 95%, non-condensing.

Do not install the system in an enclosed cabinet or other small area without ventilation.

Ensure correct lifting methods are used when handling the unit. Special care should be taken when removing the unit from its packaging and positioning it into its required location. When lifting the system, two people at either end should lift slowly with their feet spread out to distribute the weight. Always keep your back straight and lift with your legs.

When installing the system as a rack-mounted component, ensure that all Nexsan-supplied mounting fixtures are secure. All bolts and screws should be fully tightened. Failure to comply with this may result in the unit not being fully supported in the rack and could lead to the product falling from the rack causing personal injury or falling onto other rack components.

Ensure that the rack is sufficiently stable by having wall anchors and/or stabilizing legs, and that the floor supporting the rack has sufficient strength for the overall weight loading.

Only a fully-trained Service Engineer is authorized to disassemble any other part of the unit, and then only when the unit is powered off.

The system has multiple power connections; as a result, you must remove all power leads to completely isolate the power and always use the IEC power cords which are supplied with the system.

CAUTION: All Nexsan Unity expander units and Nexsan E-Series storage units are hot-pluggable. However, the unit that you are adding must be powered on AFTER you connect it to the existing unit.

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Chapter 1:UNITY5000 hardware

The UNITY5000 is a high-end storage unit in a 3U form factor with no single point-of-failure architecture, including: dual redundant storage controllers with automatic failover and full Active/Active Clustering capability; redundant, hot-swappable power supply units; and interface link aggregation for full networking redundancy. The UNITY5000 also provides a dedicated management/IPMI network interface.

The UNITY5000 is available in these configurations:

Nexsan NST5100™:

Nexsan NST5110™: NAS (CIFS/NFS) support only

Chapter 1

Nexsan NST5120™: Block (iSCSI) support

Nexsan NST5130™: Block (iSCSI) and NAS (CIFS/NFS) support

Nexsan NST5300™:

Nexsan NST5310™: NAS (CIFS/NFS) support only

Nexsan NST5320™: Block (iSCSI) support

Nexsan NST5330™: Block (iSCSI) and NAS (CIFS/NFS) support

This section includes these topics:

UNITY5000 Front and rear views 2

UNITY5000 Front panel LEDs 3

UNITY5000 General specifications 5

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UNITY5000 Front and rear views

These diagrams represent the front and rear views of the UNITY5000.

Figure 1-1: UNITY5000 Front view

Figure 1-2: UNITY5000 Rear view

Table 1-1: UNITY5000 rear components

Rear components Optional PCIe cards for connectivity

1. Power supply units

2. Fan assemblies

3. On-board GigE LAN ports (2 per node):

Top port (LAN2): LAN/data network interface (on some NST5000 models)

Bottom port (LAN1): Management and IPMI interfaces (on all models)

4. KVM connections

5. Storage connectivity:

Single SAS port PCIe to Serial Attached SCSI (HD Mini-SAS) host bus adapter

6. Network connectivity:

10GbE dual-port network PCIe card with RJ-45 interfaces, or

10GbE dual-port network PCIe card with SFP+ SR interfaces, or

GigE dual-port network PCIe card with RJ45 interfaces, or

GigE quad-port network PCIe card with RJ45 interfaces

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Chapter 1: UNITY5000 hardware

Rear components Optional PCIe cards for connectivity

7. Host connectivity:

SAS quad-port PCIe to Serial Attached SCSI (SAS) host bus adapter, or

Fibre Channel quad-port 8Gb to PCI Express Host Bus Adapter

Note Data connectivity cards are NOT

optional on the NST5300.

UNITY5000 Front panel LEDs

The LEDs on the control panel and the drive carriers keep you constantly informed of the overall status of the system and the activity and health of specific components.

Control panel LEDs

The control panel located on the right side of the Unity appliance's chassis has several LEDs. These LEDs provide you with critical information related to the node on the same side of the chassis.

This table describes what each LED indicates when illuminated and any corrective action you may need to take.

Table 1-2: UNITY5000 control panel LEDs

LED Description

Power

Indicates power is being supplied to the system's power supply units. This LED is illuminated when the system is operating.

Heartbeat

Indicates that power is being supplied to the server board. This LEDflashes amber to indicate normal activity.

NIC1

Indicates network activity on the LAN1 port when ﬂashing.

NIC2

Indicates network activity on the LAN2 port when ﬂashing.

Power failure

Indicates a power supply module as failed. The second power supply module will take the load and keep the system running but the failed module will need to be replaced. This LED is OFF when the system is operating normally.

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UNITY5000 Front panel LEDs

LED Description

Overheat/fan failure

When this LED ﬂashes, it indicates a fan failure.

When it is ON continuously, it indicates an overheat condition, which may be caused by cables obstructing the airﬂow in the system or the ambient room temperature being too warm.

This LED will remain flashing or on as long as the indicated condition exists.

► Perform these steps:

1. Check the routing of the cables and make sure all fans are present and operating normally.

2. Check to make sure that the chassis covers are installed.

3. Verify that the heat sinks are installed properly.

Drive carrier LEDs

Each drive carrier on the Unity appliance's chassis has two LEDs, a green LED on the left to indicate activity, and a red LED on the right to indicate status.

Table 1-3: UNITY5000 drive carrier LEDs

LED Description

Green When illuminated, the green LED on the drive carrier indicates the drive is powered on.

If this LED is not lit, it means no power is being provided for the drive.

Red A steady red LED indicates a drive failure.

A blinking red LED indicates that a RAID rebuild is in progress.

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UNITY5000 General specifications

This section describes the UNITY5000 hardware specifications.

Hardware component Specifications

System Up to 16 drives with 3.5'' SAS disk drives

Rail kit mounting 3U enclosure height

The rack can have round holes or square roles

Note The NST5000 rail kit does not handle round holes. Nexsan must

provide adapters to compensate.

Maximum distances: 30" (800 mm)

Redundant components 2 power supply units

Cooling fans

Chapter 1: UNITY5000 hardware

Enclosure physical dimensions

Advanced power and cooling units

Height 5.2'' 132 mm

Width 17.2'' 437 mm

Length 24.2'' 615 mm

Weight NST5100/NST5100X

84 lbs

NST5300

68 lbs

Power supply: 1,200W

Power consumption: varies depending on the number and size of drives, running fans, and room temperature

Input voltage: 100-240V

AC input voltage: 11.5A @100V; 5.5A @ 240V

AC input frequency: 50/60 Hz

AC input amperage: 11-4.5 Amp

DC output voltage: 12V (100A @ 240V), +5Vsb (6A @ 240V, 4A @ 100V)

DC output: 4 Amp @ +5V standby; 75 Amp @ +12V

With Power Distributor: +5V: 45 Amp; +3.3V: 24 Amp; -12V: 0.6 Amp

38.1 Kg

30.1 Kg

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Cooling system: 12 fans (4 cm)

6 counter-rotating fans at the front of each node

6 counter-rotating fans at the rear of each node

Power supply: 2 fans (one per power supply)

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Glossary

10Gb Ethernet

A 10 gigabit per second (Gb/s) Ethernet connection using either fiber-optic cables or twisted-pair copper wires.

10Gb iSCSI

An iSCSI connection that runs on a 10Gb Ethernet network.

Active Directory

Microsoft Active Directory® is a directory service that stores directory information on a network and makes this information available to network users and administrators. AD stores information about user accounts, such as names, passwords, phone numbers, and so on, and enables other authorized users on the same network to access this information.

primary and sends either the entire contents up to the snapshot to the remote —in the case of an initial data replication; or, only the changes since the last replication—in the case of an incremental update. Because the asynchronous data replication function takes a snapshot of the source data (on the primary system), the data always remains accessible to clients during replication. Additionally, the asynchronous data replication function keeps track of data transfers during replication by checkpointing the data stream. If data replication is interrupted—due to a network disconnect issue—the asynchronous data replication function automatically restarts replication from the most recent checkpoint. The asynchronous data replication function includes features that reduce bandwidth consumption during data replication, and consequently minimize the infrastructure cost of data replication and disaster recovery. Specifically, the asynchronous data replication function only replicates the data that changed since the last replication—which significantly reduces replication time and bandwidth requirements, particularly where only small parts of large files change or where only share metadata has changed on the primary site.

Anti-static wrist-strap

An antistatic device used to prevent electrostatic discharge (ESD) by safely grounding a person working on electronic equipment. Also called an ESD strap or a grounding bracelet.

Asynchronous data replication

Asynchronous data replication allows you to replicate data between two s —a primary and a remote (or secondary) system—over a LAN or WAN connection. The asynchronous data replication function provides off-site disaster recovery protection for the . It delivers highperformance asynchronous replication of your data over both LAN and WAN networks, providing protection from site-specific and regional disasters. The ’s asynchronous data replication function uses snapshot-based replication technology: when you initiate data replication, the asynchronous data replication function takes a snapshot of the data on the

Automatic replication

In asynchronous replication, an automatic replication refers to a scheduled replication that occurs according to a schedule you define. You can configure a separate replication schedule for each storage pool on the .

Bit

The smallest unit of digital data, representing a 0 or a 1. Abbreviated “b”.

Boot drive

The device from which a computer’s operating system is loaded. Typically, an internal hard disk drive (or one of several partitions on such a drive) is used for this purpose, but any attached storage device—such as an optical disc drive, a

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Glossary

USB flash drive, a SATADom, or other attached storage—can be used.

CHAP authentication

iSCSI initiators and targets prove their identity to each other using the Challenge Handshake Authentication Protocol (CHAP). You can use CHAP authentication to restrict iSCSI access to LUNs on the to servers (initiators) that provide the correct user name and password (or secret) combination. The ’s iSCSI implementation provides several layers of CHAP authentication.

CIFS

(Common Internet File System) The protocol used in Windows environments for shared folders.

Command-line interface

A means of interaction between a human user and a computer program, or between two programs, where the user (or client) passes commands in the form of a line of text to a computer program. The Nexsan offers a command-line interface. Abbreviated “CLI”.

Controller

The controller in the acts as the interface between the and network clients. The has two controller nodes, represented by the Clusters node in E-Centre™, for which you can configure both cluster and network settings. Can also be referred to as Controller Node or Node.

DHCP

(Dynamic Host Configuration Protocol) A communication protocol that lets network administrators manage centrally and automate the assignment of Internet Protocol (IP) addresses in a network.

DIMM

Dual In-line Memory Module. The type of random-access memory (RAM) that the Nexsan uses.

Directory Service

A directory service is the software system that stores, organizes and provides access to information in a directory. A directory service called a naming service, maps the names of network resources to their respective network addresses. With the name service type of directory, a user does not have to remember the physical address of a network resource; providing a name will locate the resource. Each resource on the network is considered an object on the directory server. Information about a particular resource is stored as attributes of that object. Information within objects can be made secure so that only users with the available permissions are able to access it. In LDAP, the name is called the Distinguished name (DN) and is used to refer to a collection of attributes (relative distinguished names) which make up the name of a directory entry.

DNS

(Domain Name System) A program or computer server that implements a name-service protocol. It maps a human-recognizable identifier to a system-internal, often numeric, identification or addressing component (usually an IP address).

E-Centre

Web-based graphical user interface for managing and E-Series storage devices. It provides a hierarchical view of a site and overall system components; as well as wizard-based configuration tools for creating storage pools, file systems, shares, replication sites, and for performing other storage management tasks on the system.

Electrostatic discharge (ESD)

The sudden and momentary electric current that flows between two objects at different electrical

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Glossary

potentials caused by direct contact or induced by an electrostatic field. Potentially harmful to electronic components.

Ethernet

A local area network (LAN) architecture using a bus or star topology and supporting data transfer rates of 10, 100, and 1000 Mbps. It is one of the most widely implemented LAN standards. The

802.11 protocols are often referred to as “wireless Ethernet.”

Event log

A record of system events that tracks informational, warning, and error events, such as when significant milestones are reached or when errors occur during activity.

Expansion Controller

A module of Nexsan NST5100X expansion units that connects via SAS to a Nexsan NST5100 storage unit’s Controller Node.

Failover

The capability of a system to switch over automatically to a redundant or standby system upon the failure or abnormal termination of the previously active system. In Nexsan s, failover describes one Controller Node taking over the host connections and storage pool control of the other Controller Node when that controller fails.

FASTier™

Nexsan’s proprietary cache system that uses SSD or NVDIMM technology to increase random I/O performance of SATA and SAS disk drives.

Channel signaling can run on both twisted-pair copper wire and fiber-optic cables.

Fibre Channel port

Any entity that actively communicates over a Fibre Channel network. Usually implemented in a device such as disk storage or a Fibre Channel switch. Depending on the system, the Fibre Channel ports on Nexsan storage units can support 2Gb/s, 4Gb/s, or 8Gb/s connections.

Fibre Channel switch

A network switch compatible with the Fibre Channel protocol. Allows the creation of a Fibre Channel network, which is currently the core component of most storage area networks (SANs).

Fibre Channel target

A storage system end-point on the that uses Fibre Channel connectivity. Each storage pool can have one or multiple Fibre Channel targets. Fibre Channel targets can be seen by all ports on the .

Firmware

Software stored in read-only memory (ROM) or programmable ROM (PROM), therefore becoming a permanent part of a computing device.

Full replication

In asynchronous replication, full replication refers to a replication operation that sends all the data on the primary to the remote . Only the initial replication, when you first set up asynchronous data replication between two systems, is a full replication. All successive replications are incremental.

FCC

The Federal Communications Commission; the federal agency that regulates electromagnetic emissions.

Fibre Channel

A gigabit (Gb) speed network technology primarily used for storage networking and the current standard connection type for storage area networks (SANs). Despite its name, Fibre

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Gateway

An internetworking system that joins together the different subnets of a network or two networks that use different base protocols. A network gateway can be implemented completely in

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Glossary

software, completely in hardware, or as a combination of both.

Gigabit. Approximately one billion (1,000,000,000) bits.

Gb/s

Gigabits (Gb) per second. Used to describe the speed of network data transmission.

Gigabit interface converter

A standard for transceivers, commonly used with Gigabit (Gb) Ethernet and Fibre Channel, with a hot-swappable electrical interface. Gigabit interface converter ports can support a wide range of physical media, from copper to optical fiber, at lengths of hundreds of kilometers.

Graphical user interface (GUI)

A type of user interface that allows users to interact with electronic devices using images rather than text commands. Nexsan storage units use a graphical user interface for system configuration

Host

A computer, server, or other device which accesses the shares in a Nexsan storage system. The host can be connected to the storage system with a Fibre Channel connection, an iSCSI connection, or a SAS connection.

HTTP

The Hypertext Transfer Protocol is an application protocol for distributed, collaborative, hypermedia information systems. HTTP is the foundation of data communication for the World Wide Web. Hypertext is structured text that uses logical links (hyperlinks) between nodes containing text. HTTP is the protocol to exchange or transfer hypertext.

HTTPS

(HTTP Secure) Communications protocol for secure communication over a computer network, with especially wide deployment on the Internet.

Technically, it is not a protocol in itself; rather, it is the result of simply layering the Hypertext Transfer Protocol (HTTP) on top of the SSL/TLS protocol, thus adding the security capabilities of SSL/TLS to standard HTTP communications.

I/O

Input/Output. The communication between an information processing system (such as a computer or a Nexsan storage system’s Controller Node), and the outside world (either an operator or another information processing system). Inputs are the signals or data received by the system, and outputs are the signals or data sent from it

IDMU

Microsoft Identity Management for UNIX. IDMU makes it easy to integrate users of Windows operating systems into existing UNIX environments. It provides manageability components that simplify network administration and account management across both platforms. IDMU allows you to manage user accounts and passwords on Windows and UNIX systems using Network Information Service (NIS). IDMU also allows you to automatically synchronize passwords between Windows and UNIX operating systems.

Incremental replication

In asynchronous replication, incremental replication refers to a replication operation that sends only the data that changed since the last replication (whether that one was full or incremental).

Initiator

An application or production system end-point that is capable of initiating an iSCSI session with an iSCSI target, sending iSCSI commands and I/O requests. Initiators are also identified by unique addressing methods.

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Glossary

(Internet Protocol) The network layer for the TCP/IP protocol suite widely used on Ethernet networks.

IP address

(Internet Protocol address) A numerical label assigned to each device (such as a computer, printer, or Nexsan storage unit) on a computer network that uses TCP/IP for communication.

IPMI

(Intelligent Platform Management Interface) The IPMI interface allows you to perform administrative tasks to remotely manage the in the event that you are unable to connect to the using a conventional method: through E-Centre™ or from the nxadmin CLI.

IQN

(iSCSI qualified name) Unique identifier of a device in an iSCSI network. iSCSI uses the form iqn.date.authority:uniqueid for IQNs. For example, iqn.1999-02.com.nexsan:<site name>:<pool name>:<unique ID>. This name indicates that this is an iSCSI device from Nexsan, which was registered as a company in February of 1999. The naming authority is simply the DNS name of the company reversed; in this case, com.nexsan. Following this is the site name, the storage pool name where the target exists, and a user-defined unique ID to identify the target.

iSCSI

(Internet Small Computer System Interface) A transport protocol that provides for the SCSI protocol to be carried over a TCP/IP network.

iSCSI Target

A storage system end-point on the that processes iSCSI commands and I/O requests from an initiator. Each storage pool on the can have one, or multiple, iSCSI targets, with a maximum of 256 targets per storage pool (0 to

255). In turn, each target can have a maximum of 256 LUNs (0 to 255). Each target on the is identified by a unique addressing method (IQN).

iSCSI Target public alias

This is a symbolic name that you can assign to a target on the . The public alias is seen by some iSCSI initiators; it can help you identify the target. The public alias for a storage pool’s default target—that is, the target that the creates for a storage pool when you first add a LUN to the storage pool—is the pool name. You can change a target’s public alias at any time.

iSNS

(Internet Storage Name Service) Protocol designed to facilitate the automated discovery, management, and configuration of iSCSI devices on a TCP/IP network. You can configure iSCSI targets to use an iSNS server.

LAN

(Local area network) A computer network that links devices within a small geographic area, such as a building or group of adjacent buildings.

LDAP

(Lightweight Directory Access Protocol). LDAP is a protocol used to communicate with a directory service. It defines operations to refer to an entity in the directory, to describe the attributes of an entity, and the security features that can be used to authenticate to the directory and control access to the entities within the directory. The protocol is carried directly over TCP for connection-oriented transport (receipt of data is acknowledged) and User Datagram Protocol (UDP) for connectionless transport (no acknowledgment upon sending or receiving data).

LED

(Light Emitting Diode) LEDs are used for indicator lights on the front and back of Nexsan storage units.

LUN

A LUN is a term used to describe a block of storage on the . Uniquely numbered, this creates what is referred to as a Logical Unit Number, or

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Glossary

LUN. LUNs can be exposed over iSCSI and Fibre Channel. When associated with an iSCSI target, a LUN forms a unique iSCSI block device that can be accessed by one or more iSCSI initiators. When exposed to the common Fibre Channel target on the , a LUN forms a block device identified by a unique HBA port WWN that can be accessed by one or more FC initiators.

Management target

Each storage pool on the has a Management target (mgmt) assigned to it by the system, by default. The management target allows a VSS (Volume Snapshot Service or Volume Shadow Copy Service) host to create and manipulate shadow copies (point-in-time snapshots) of the data in LUNs on the . The VSS host connects to a storage pool’s Management target via iSCSI to view, create, and manage snapshots of the LUNs in the storage pool. You can assign a CHAP (Challenge Handshake Authentication Protocol) user to the Management target to restrict access to LUN snapshots in a storage pool, to specific VSS hosts.

Manual replication

In asynchronous replication, an offline, or manual, replication is a replication process that you start manually on a storage pool. With offline replication, you can replicate the data in the storage pool to the remote , or to a USB storage device attached to the primary .

Megabit. Approximately one million (1,000,000) bits.

Mb/s

(Megabits (Mb) per second) Used to describe the speed of network data transmission.

MPIO (Multipathing I/O)

MPIO is designed to provide multiple paths to SAN storage. It provides connection failover and

load balancing benefits to strengthen the stability of a network storage environment.

NAS

(Network-attached storage) File-level computer data storage connected to a computer network providing data access to clients on the network. Network-attached storage uses specialized hardware, software, or both, and is often a specialized device built from the ground up for storing and serving files.

NDMP

(Network Data Management Protocol) Protocol used to transport data between network attached storage (NAS) devices and backup devices. This removes the need for transporting the data through the backup server itself, thus enhancing speed and removing load from the backup server.

NetBIOS

(Network Basic Input/Output System) API that allows applications on separate computers to communicate over a local area network. NetBIOS offers 3 services: Name service (UDP port 137), Datagram distribution service (UDP port 138). and Session service (TCP port 139).

NFS

(Network File System) A protocol allowing a user on a client computer to access files over a network in a manner similar to how local storage is accessed. Used in most UNIX environments for folder or device sharing.

NIS

(Network Information Service) One of the three UNIX directory services supported by the . NIS is a client–server directory service protocol for distributing system configuration data such as user and host names between computers In a UNIX network environment. It was originally called Yellow Pages or YP. A NIS/YP system maintains and distributes a central directory of user and group information, host names, e-mail

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aliases and other text-based tables of information in a computer network.

NMP

(Network Management Protocol) Suite of network protocols that define the processes, procedures and policies for managing, monitoring and maintaining a computer network. NMP conveys and manages the operations and communications performed on a computer network.

NTP

(Network Time Protocol) A protocol designed to synchronize the clocks of devices over a network.

Offline replication

(Organizational Unit) A useful type of directory object that is contained within domains is the organizational unit (OU). OUs are Active Directory containers into which you can place users, groups, computers, and other OUs. An OU cannot contain objects from other domains. An OU is the smallest scope or unit to which you can assign Group Policy settings or delegate administrative authority. Using OUs, you can create containers within a domain that represent the hierarchical, logical structures in your organization. You can then manage the configuration and use of accounts and resources based on your organizational model. OUs can contain other OUs. You can extend a hierarchy of OUs as necessary to model your organization's hierarchy within a domain. Using OUs helps you minimize the number of domains that are required for your network. You can use OUs to create an administrative model that you

can scale to any size. A user can have administrative authority for all OUs in a domain or for a single OU. An administrator of an OU does not have to have administrative authority for any other OUs in the domain.

PCIe

Peripheral Component Interconnect Express. A computer expansion card standard designed to replace the older Peripheral Component Interconnect (PCI), PCI-eXtended (PCI-X), and Accelerated Graphics Port (AGP) standards.

Pool

A storage pool is a user-defined virtual grouping of volumes on the . Pools allow you to organize your storage into logical groups; expose file systems as shares to CIFS clients (Windowsbased systems) and NFS clients (UNIX/Linuxbased systems); and replicate all the data in the pool, or just a subset of it, for disaster recovery. E-Centre™ allows you to create as many storage pools as there are available volumes (RAID sets) on the system. If the has both internal storage (E5100™) and a Nexsan NST5100X™ Expander unit connected externally via SAS, you can create storage pools by combining volumes from both the NST5100™ Storage and the Nexsan NST5100X™—provided the RAID level configurations are the same on both storage systems (or, enclosures).

Power supply unit (PSU)

A module that regulates electrical power to the components of Nexsan storage units.

Primary

In asynchronous replication, a primary site refers to an that contains the data to be replicated (to a remote, or secondary, ). An can be the primary site in a replicated environment and also perform double-duty as the remote data replication site for another .

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Public alias

This is a symbolic name that you can assign to a target on the . The public alias is seen by some iSCSI initiators; it can help you identify the iSCSI target. The public alias for a storage pool’s default target is the pool name. You can change a target’s public alias at any time.

RAID 10

RAID 10 provides very high performance and redundancy. In a RAID 10 implementation, data is simultaneously mirrored and striped. RAID 10 can, under certain circumstances, support multiple drive failures. It is ideally suited for situations where both high performance and redundancy are important. RAID 10 implementation on has some unique requirements, and please refer to "Understanding storage pools, volumes, and storage enclosures".

RAID 5

RAID 5 provides redundancy by writing data and parity information across three or more drives, thereby increasing performance. You need at least 3 disk drives for a RAID 5 implementation. RAID 5 can withstand a single disk failure without losing data or access to data. It is ideally suited for transaction processing, database applications, file and print servers.

RAID 6

RAID 6 is similar to RAID 5, but with better fault tolerance. RAID 6 stripes blocks of data and parity across an array of drives like RAID 5, except that it calculates two sets of parity information for each parcel of data. This significantly improves fault tolerance: RAID 6 can withstand the failure of any two drives in the array without losing data or access to data. RAID 6 is ideally suited for the same applications as RAID 5, but in situations where additional fault tolerance is required. We recommend adding Nexsan FASTier cache devices to a RAID 6 implementation to improve write performance.

Random-access memory (RAM)

A memory chip that allows stored data to be accessed at any time in any order. Commonly used in computers as main operating memory. Values in randomaccess memory are often volatile; information is lost if power is removed from the module.

Read-only memory (ROM)

A memory chip that stores values but cannot be changed by normal program instructions. Values in read-only memory are nonvolatile; they are retained even when the unit is powered down.

Remote

In asynchronous replication, a remote or secondary site represents the system to which data from the primary is replicated. In a deployment where asynchronous replication is not implemented, a remote represents a site that is being managed remotely from another or site.

Replica

A duplicate of a file system on a Nexsan copied onto another Nexsan . At the time of replication, replicas contain all of the data on the original volume. Replicas can be promoted to full file systems, after which replication between the two file systems is no longer possible.

Replication

A function of Nexsan s that allows the user to make replicas of a volume onto another Nexsan to protect data in the event of a disaster, or as part of a backup and restore architecture.

SAN

(Storage area network) An architecture that provides for attachment of remote computer storage devices to servers in such a way that the devices appear as locally attached to the operating system.

SAS

(Serial Attached SCSI) A serial version of the SCSI interface. A point-to-point architecture that

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uses a disk controller with four or more channels that operate simultaneously. Each full-duplex channel, known as a SAS port, transfers data at

1.5Gb/s, 3Gb/s, or 6Gb/s in each direction. SAS also supports Serial ATA (SATA) drives, which can be mixed with SAS drives in a variety of configurations.

SATA

(Serial Advanced Technology Attachment) A connection standard for fixed and removable hard disk drives.

Scheduled replication

In asynchronous replication, a scheduled replication refers to an automatic replication that occurs according to a schedule you define. You can configure a separate replication schedule for each storage pool on the .

SCSI

(Small Computer System Interface) A collection of standards and proposed standards for input/output (I/O) communication, primarily intended for connecting storage subsystems or devices to hosts.

Secondary

SFP

(Small Form-factor Pluggable) A type of gigabit interface converter (GBIC) in a compact form factor. The Fibre Channel ports or 10Gb iSCSI ports on Nexsan storage devices are SFPs.

A share is a file system or one of its subfolders which has been exposed on the network via CIFS protocol and/or the NFS protocol.

SMB

(Server Message Block) CIFS—also referred to as SMB—is used by Windows-based systems to share files and printers across the network. Use

this sharing method if your environment consists mainly of Windows-based systems.

SNMP

(Simple Network Management Protocol) The SNMP agent included in the allows you to send SNMP traps to a Network Management Station— such as, HP OpenView or CA Unicenter—when a Critical, Error, and/or Warning event is generated by a source component of the .

SSD

(Solid State Disk) A high-performance storage device that contains no moving parts.

SSL

(Secure Sockets Layer) A commonly used protocol for transmitting private documents via the Internet. SSL works by using a public key to encrypt data that is transferred over the SSL connection. The SSL protocol secures the following data: I/O, serial port, and VSIP communication; it does not apply to audio and video transmission.

Storage pool

Subnet

A subnetwork, or subnet, is a logically visible subdivision of a TCP/IP network. All computers in a subnet have IP addresses with the same prefix. Addresses in the same subnet are

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reachable without going through a router, and thus can be reached by broadcast.

Subnet mask

A means of restricting IP addresses on a subnet to a specific range.

Synchronous data replication

The synchronous data replication feature allows you to synchronously replicate a storage pool between two Nexsan E-Series™ storage systems connected to an via SAS (or Fibre Channel)—for example, the Nexsan E18™, Nexsan E48™, and/or Nexsan E60™ storage systems. The synchronous data replication feature essentially mirrors all the data contained in a storage pool between a source Nexsan storage system and a target Nexsan storage system—both of which are connected to the same via SAS (or Fibre Channel). You designate the storage system to use as the source—that is, the system on which you create the storage pool and store your data—and the target, where the source data is mirrored. Synchronous replication ensures that a copy of the data, which is identical to the source copy, is created at the time the source copy is updated. In synchronous replication, an I/O-update operation is not considered done until completion is confirmed on both the source and target. An incomplete operation is rolled back on both the source and target, ensuring that the target is always an exact mirror image of the source.

Provisioning, you can flexibly allocate disk space (on an LUN) to the client system (initiator), in order to expand the storage capacity available to the client system at any time. Thin Provisioning allows you to specify the size of the virtual volume that initiators on the network see when they connect to a LUN, irrespective of the actual space that you reserve for the LUN in the storage pool.

Volume

A volume represents a virtual subset of the aggregated disk space available on the , or on a Nexsan E-Series™ attached externally to the — for example, a Nexsan E18™, Nexsan E48™, or Nexsan E60™ storage system connected externally to the via Fibre Channel or SAS, or an Nexsan Expander unit connected to the via SAS.

In short, E-Centre™ presents the disk space available on the , or on any Nexsan storage system attached externally to the , as volumes. The total number of volumes available on the ’s internal disk storage, as well as on storage systems attached externally to the , depends on the RAID level (5, 6, or 10) and RAID sets that you specify during the initial setup of the . For example, on an with 15 disk drives installed in the front bay of the system, a RAID 5 configuration with 2 RAID sets results in 2 volumes with 7 disks drives in each volume, and 1 hot spare assignment for the array.

TCP/IP

(Transmission Control Protocol/Internet Protocol) The set of communications protocols used for the Internet and other similar networks. TCP provides reliable delivery of messages between networked computers. IP uses numeric IP addresses to join network segments.

Thin Provisioning

Thin Provisioning allows you to dynamically allocate disk space to a client system (initiator) connected to the a LUN on the . With Thin

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VSS

(Volume Shadow Service) The 's VSS Hardware Provider enables a VSS host to create and manipulate shadow copies (point-in-time snapshots) of the data in LUNs on the . The VSS Hardware Provider supports Windows Volume Snapshot Service (or Volume Shadow Copy Service). The VSS Hardware Provider serves as the interface between Windows Volume Shadow Copy Service running on a host system and the .

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WAN

(Wide Area Network) A computer network that spans a relatively large geographical area. Typically, a WAN consists of two or more local area networks (LANs).

Wizard

A graphical user interface type that presents a user with a sequence of dialog boxes that lead the user through a series of well-defined steps.

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Index

Active/Active clustering 1

CIFS sharing 1 Control panel LEDs 3 Cooling units 5

Drive carrier LEDs 4

Enclosure dimensions 5

Rail kit mounting 5 Rear view 2

Specifications 5

Voltage 5

Front panel LEDs 3 Front view 2

General specifications 5

NFS sharing vi, 1 NST5000

Front panel LEDs 3 Hardware configurations 1 Rear components 2 Storage connectivity 3

Power failure LED 3 Power LED 3 Power units 5

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Document Reference:20170218PM012203

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This pr oduct is protected byone or more of the following patents, and other pending patent applicationsworldwide:

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United Kingdom patents GB2466535B, GB2467622B, GB2467404B, GB2296798B, GB2297636B

Firmware Version: Unity1.4