Q
Problem solve Get help with specific problems with your technologies, process and projects.

Fibre adapter hosting both disk and tape

What are the pro's and con's of utilizing one Fibre adapter in a Fabric environment to host both disk and tape? Should they remain separate in a Fabric environment? I get asked the question these days of, Can I place two Fibre Adapters in a system, have one for failover and/or redundancy, while having both disk and DLT tape (for backup) connected to both adapters? I understand that this would not be appropriate if one were FC-AL and the other Fabric due to LIP, but now that Fabric (the ability to log-on with a WWW) disk and libraries are available does this all become a reality? Thanks for your time and clearing this issue up for me!

In original FC-AL based SANs, tape and disk traffic had to be on separate adapters due to SCSI bus resets being generated by the tape subsystems, which affected disk based I/O.

In today's environments, using switches and Fibre to SCSI bridges, the tape traffic no longer affects disk traffic, due to a switched fabrics point to point nature. Connection to both tape and disk can now be provided over a single adapter, or dual adapters for performance/fail over capability. I would recommend using two adapters for availability, and perform backup over one adapter while production is up on the other. This would allow the data to stream more effectively to tape, while not impacting production.


Dig Deeper on SAN technology and arrays

Questions and answers from SAN School Storage area networks (SANs) have the ability to save a company money, hasten backups and help consolidate the data center. But, a SAN is not to be left alone. It's a complex, growing, breathing entity that constantly needs to be tweaked and upgraded.

So what is SAN School? If this is the first time you are asking yourself, "What's a SAN?" -- SAN School is for you. If you are implementing your first SAN and need implementation and migration help -- SAN School is for you. If you are far along in the SAN process and need to extend your SANs or connect SAN islands -- SAN School is for you.

The authors of "Storage Area Networks for dummies", Christopher Poelker and Alex Nikitin, are your SAN School professors. Through 15-minute Webcast lessons, they covered SANs from A to Z, from what a SAN is, to connecting those last nodes for optimal performance.

SearchStorage.com readers sent Chris and Alex received a lot of questions during each SAN School Webcast lesson. Since each lesson only lasted 15 minutes, they weren't able to answer all of your questions. Thanksfully, though, Chris Poelker was kind enough to answer them after each lesson.

The editors of SearchStorage.com have taken each of your questions and Chris's answers and posted all of them for you here. Also, if you missed any of teh SAN School Webcasts, click here

Have a question for an expert?

Please add a title for your question

Get answers from a TechTarget expert on whatever's puzzling you.

You will be able to add details on the next page.

Start the conversation

Send me notifications when other members comment.

Please create a username to comment.

-ADS BY GOOGLE

SearchDisasterRecovery

SearchDataBackup

SearchConvergedInfrastructure

Close