Fibre Channel is better as the storage array interface, simply because that's what's available today. As for storage applications, I can only think of one application - high definition video - that really leverages the use of 4Gbps Fibre Channel for the host connection. So today, Fibre Channel may be a better solution for post-production editing of HD video.

For environments consisting of many midrange or low-end servers, an IP SAN (iSCSI) solution often delivers the most appropriate price/performance. The performance of iSCSI and FCP is roughly comparable (both are much faster than direct-attached storage), and for typical business applications most end users won't notice the difference.

Yes, if you connect your Fibre Channel storage to an iSCSI Appliance. These appliances can have internally a fibre channel card which you directly connect your existing FC storage.

Fibre Channel is a high-speed serial interconnect, not a network. Fibre Channel technology has been historically expensive, with no built-in capabilities to do routing and node failover and only primitive address management and security capabilities (although this is slowly changing). In a Fibre Channel SAN, all these capabilities have to be operator configured and host managed. The result is an expensive, complex environment.

Fibre Channel is a well-established, widely deployed technology with a proven track record, particularly in high-performance, mission-critical data center environments. Many in the industry view Fibre Channel and iSCSI as complementary technologies that will coexist for the foreseeable future.

Fibre Channel is still viewed as an alien architecture. It requires special training and high-priced expertise to keep a Fibre Channel fabric operational. Fibre Channel also requires its own management software, which is not fully integrated with mainstream IP network management. So, although Fibre Channel fabrics have many technical strengths, overall they require additional skill sets and tools. IP storage protocols such as iSCSI, iFCP and iSNS integrate directly into mainstream IP networking.

Fibre Channel environments are perceived to be secure since they are controlled private networks. iSCSI is perceived to be less secure since it is Ethernet-based. However, Fibre Channel has essentially no security capabilities, while iSCSI has very extensive security features. The iSCSI spec covers initiator and target authentication (using CHAP, SRP, Kerberos, and SPKM) to prevent unauthorized access and permit only trustworthy nodes.

Fibre Channel interoperability problems were primarily due to two issues. First, the server vendors implemented the SCSI-3 command set differently. Over the past eight years, however, vendors have resolved many of the problems related to this issue. The second issue is that Fibre Channel lacks built-in networking capabilities, and this results in significant complexity due to proprietary features.

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Generically, IP storage involves any storage functionality that is leveraging TCP/IP as a network transport...

This is a discussion that will go on for some time and there is no simple answer. It depends on the application. At least until now, fibre channel (FC) implementations of SCSI have been FC-AL or FC-Arbitrated Loop, so I will limit my comments to FC-AL.

In general, Digital River prefers FTP/SFTP based end points for sales reports. If your requirements are for near real time feeds, then we ask clients to provide an HTTP based end point.

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For some industries, especially photography, 24-bit colour depths (8 bits per channel) are a real barrier to entry. Once again, it's GEGL to the rescue. Work on integrating GEGL into GIMP will begin after 2.4 is released. Once that work is completed, GIMP will support 16 bits per channel. If you need such support now and can't wait, cinepaint and krita support 16 bits per channel now.

ESP (Encapsulating Security Payload) is an Internet standard for the authentication and encryption of IP packets. ESP is widely deployed in IP networks and has been adapted for use in Fibre Channel networks. The IETF iSCSI proposal specifies ESP link authentication and optional encryption. ESP over Fibre Channel is focused on protecting data in transit throughout the Fibre Channel network. ESP over Fibre Channel does not address the security of data which is stored on the Fibre Channel network.

The wide variety of fibre optic systems that have come into use because of the advantages of optical fibres are discussed as under : Long Haul telecommunication systems on land and at sea to carry many simultaneous telephone calls(or other signals) over long distances.These include ocean spanning submarine cables and national backbone networks for telephone and computer data transmission .

Fiber Channel, being a high speed serial interconnect, has no routing and failover capabilities and allows for only primitive address management and security considerations. To overcome these limitations, complex configuration schemes have been devised that require specialized expertise and complex environments. These have made Fiber Channel based solutions inherently expensive to acquire and maintain.

This very much depends on how you intend to connect your server(s) and how much redundancy is required. Fibre-channel systems are currently more expensive than SCSI, although costs are slowly coming down. However, there are more advantages to Fibre-channel than just bandwidth (200 Mb/sec for dual loop fibre). Fibre-channel can be used to connect up to 128 devices into a storage area network (SAN) and hubs can be used so that one device cannot break the loop.

Fibre-channel is a highly reliable Gigabit interconnect technology which allows concurrent communications among workstations, mainframes, servers, data storage systems and other peripherals using SCSI and IP protocols. It provides interconnect systems for multiple topologies that can scale to a total system bandwidth of the order of a Terabit per second. Fibre-channel delivers a new level of reliability and throughput.

FCAP is an optional authentication mechanism employed between any two devices or entities on a Fibre Channel network using certificates or optional keys.

The MegaRam-1000, 2000, and 5000 all feature a native Fibre Channel architecture. We do not use a SCSI-to-Fibre bridge which would significantly impact performance. Imperial's MegaRam SSDs have been available with native Fibre Channel interconnection since 3Q 2000.

In addition to conventional unattended backup and archiving, AIT is also suited to a wide range of new applications, such as image/multimedia storage and retrieval and real-time data acquisition as well as Write-Once-Read-Many (WORM) data storage and retrieval. [Return to Top]

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Taskmaster was designed as a solution for the complete spectrum of information capture automation. Use Taskmaster for: Digital Mailroom" applications for indexing and rules-based classification of documents, faxes and e-mail

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Answer: No, in most cases you do not. One of the major advantages of iSCSI over Fibre Channel SANs is that it utilizes existing IP infrastructure. In some cases, however, it might be desirable to separate storage traffic into a dedicated network for performance reasons. This is especially true for installations which do not have a Gigabit Ethernet network installed. Answer: Yes--In February 2003 the IESG approved iSCSI draft 20 (with two brief modifications) as a Proposed Standard.

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