Q

Ports changing from fabric to loop mode

Storage expert Greg Schulz explains why a reader's ports are changing from fabric to loop mode.

Ports on my Brocade 4100 have been changing from fabric ports to loop ports. What is the significance of this and why does it happen?
When are the ports changing from fabric to loop mode? Are they changing randomly on their own and independently of when any devices are being added, removed or powered on?

The significance is that if a loop device, for example an older tape drive, is attached and powered on, a fabric port can automatically sense and change to loop mode. Likewise, if a loop device were removed and a fabric enabled device were plugged into the port, the Brocade switch can automatically sense and change it to fabric port.

If your ports are changing randomly and independently of any devices being added, removed, powered up, or during backups, check with your solution provider or the Brocade tech support Web site to see if you need to adjust some settings or firmware.

This was first published in March 2007

Dig deeper on Fibre Channel (FC) SAN

Pro+

Features

Enjoy the benefits of Pro+ membership, learn more and join.

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.

0 comments

Oldest 

Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to:

-ADS BY GOOGLE

SearchSolidStateStorage

SearchVirtualStorage

SearchCloudStorage

SearchDisasterRecovery

SearchDataBackup

Close