D-Link DSL-2320B - 24 Mbps DSL Modem Guía de usuario descargar pdf (Pagina 106)

D-Link Product Guide 2008

104

Features & Benefits

These Storage Area Networks (SANs) are designed to provide a reliable network

data storage solution for customers in entry-level and SMB segments. Utilizing a 10-

Gigabit iSCSI System-on-a-Chip (SoC) solution that can handle over 65,000 I/Os per

second and capable of supporting over 11TB raw capacity using high-capacity hard

drives, these SANs can easily be implemented as near line storage to supplement

primary IP network storage solution or be used as a basic backup and recovery device.

This evolutionary advancement in performance is a testament to the tightly integrated

xStack Storage architecture and is a sharp contrast to the discrete implementation of

competing products.

SAN has been traditionally reserved for Fiber Channel networks until the recent

introduction of iSCSI that extends this powerful yet simple centralized backend

(behind server-based) storage system to IP networks. By utilizing existing Ethernet

technology, the cost associated with separate host bus adapters and the per-

Gigabyte cost for storage is significantly reduced. IP SAN based on iSCSI technology

can leverage existing and familiar Ethernet standards to provide speeds of up to

1160MBytes bandwidth.

D-Link SAN Array implements multiple Gigabit ports and supports IEEE 802.3ad Link

Aggregation Groups (LAG) for full offload capability so that multiple ports can be

grouped together for increased throughput and redundancy.

D-Link SANs also provide the industry’s first built-in, fully integrated 10-Gigabit

interface, providing up to 1160MBytes bandwidth and a high performance alternative

to the multi-Gigabit Fiber Channel.

By utilizing a SoC design, D-Link SANs combine both networking and storage functions

into a single specialized Application Specific Integrated Circuit (ASIC). The SoC

solution combines 10-Gigabit iSCSI, TCP & IP offload, embedded processors, and a

storage virtualization firmware stack onto a single chip. The tight integration of these

functions eliminate interoperability, timing, and support issues found in competitive

products that offer “discrete implementation” wherein a chassis, a main motherboard,

a RAID storage controller, iSCSI software or controller, network interface cards, and

operating system software are picked separately and then assembled. D-Link SANs

outperform these discrete implementations and do so at a lower price point. They also

deliver mission critical data quickly with state-of-the-art reliability.

The SAN platform features 15 hot swappable Serial ATA (SATA) disk drive bays

supporting over 11TB raw capacity using 750GB hard drives (and even higher capacity

hard drives as they are introduced) in RAID level 0, 1, 1+0 and 5 configurations.

Users can quickly deploy a SAN using inexpensive SATA disk drives and depending

on their growing storage needs, they can simply add more drives.

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The Seagate Barracuda ES family of enterprise class SATA hard drives provides high

performance with very high reliability for business critical applications.

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STORAGE AREA NETWORKS

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» Embedded IP-SAN Device Manager

(IDM) allows monitoring and control of

SAN via SMI-S (Storage Management

Initiative) command set.

» Embedded secure server for remote

configuration/monitoring of SAN storage

subsystems.

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Features

» Additional advanced features for efficient

management of network storage and

optimal performance.

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» Provides write-back, write-through, write

coalescing, multi-stream read-ahead on

a volume basis.

» Optimizes cache utilization and

performance in an application

dependent manner.

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» 802.1Q VLAN tagging to segregate

traffic into isolated zones for secure

access.

» Jumbo frames to improve network

throughput/reduce CPU overhead.

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» 802.1p Priority Queues for time-

sensitive packets.

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» Storage management software stack for

volume virtualization utilizing concept of

storage extents.

» Fundamental building blocks to enable

RAID, online capacity expansion,

volume migration.

» Drives of dissimilar sizes can be used to

create volumes.

» Growth can occur without volume

migration or reconstruction.

» Single drives can contain multiple and

divergent RAID technologies.

» Volume structure can provide

infrastructure for Snapshot copies.

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» RAID Levels 0, 1, 1+0, 5 and JBOD

(striped sets, mirrored sets, striped

mirrored sets, parity sets and JBOD)

STORAGE

™

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» Protection against unresponsive SATA

commands by forcing a response within a

preset time limit.

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» Volumes can be expanded and/or migrated

to other RAID levels while online and with

minimal impact on users. For example, a

mirror volume of two drives can easily be

converted to a parity volume of three or more

drives while users continue to access this

storage.

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