It is possible that ports are changing from fabric to loop mode because one of the following events has occurred:
- A previously empty switch port has had a loop device, such as a tape drive, connected to it.
- A connected device has had its topology changed from fabric mode to loop mode.
- A fabric device has been removed from the switch port and has been replaced with a loop device.
The above scenarios are all dependant on the switch ports being in auto-sensing mode. If the ports are fixed to a certain topology and one of the above takes place, the switch ports will need to be manually altered to enable the switch to talk to the connected device.
Related Q&A from Steve Pinder
When adding an old hard drive to RAID sets on servers, it’s important to account for factors such as the number of drive bays in the host. See how to... Continue Reading
In this Ask the Expert, Steve Pinder talks about which RAID level to choose, depending on the criticality of your data or the capacity required. Continue Reading
Learn about the differences between a FATA disk and a Fibre Channel drive, and find out how to determine which drive type is better for Exchange 2007... Continue Reading