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Old 12-12-2006, 11:42 AM   #1
Registered: Apr 2006
Posts: 154

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Re-Scan the bus for new devices

Hey guys how do I rescan the bus for new devices. I am attaching some fiber attached drives through a san switch and also playing around with some zoneing. My qusetion is how do I rescan the bus after I make changes to see the new devices? I have been rebooting then looking at dmesg. I am running EL 4.


Old 12-12-2006, 01:00 PM   #2
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Registered: Nov 2004
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In the file /proc/scsi/scsi appears the devices.

In addition there are tools that permits a rescan units, for example for hp is hp_rescan. Also Qlogic and Mylex have their utilities.

For example:

QLogic FC HBA LUN Scan Utility
This utility scans for the newly added LUNs. After adding the new LUNs it is not required to unload/load the QLogic FC driver or reboot the system. To see the newly added LUNs, just run the utility.

The simplest way to use this utility is to run
# ./

Last edited by STIBAL; 12-12-2006 at 01:07 PM.


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