Where is WWN number in Redhat Linux?
How to find WWN number of HBA and scan the FC Luns in LINUX?
- Identify the number of HBA adapters. systool -c fc_host -v.
- To get the WWNN (World Wide Node Number) of HBA or FC card in Linux.
- To get the WWPN (World Wide Port Number) of HBA or FC card in Linux.
- Scan newly added disks or rescan existing LUNs in Linux.
What is a WWN number?
A World Wide Name (WWN) is a unique identifier that is hard-coded into each Fibre Channel (FC) device by the device’s manufacturer. WWNs provide a method for identifying FC devices across the network.
How do I find the LUN ID in Redhat Linux?
At the command prompt type echo “scsi-add-single-device H C I L” >/proc/scsi/scsi where H is the host adapter, C is the channel, I id the ID and L is the LUN and press the key. Repeat this step for additional devices.
What is WWN ID?
A World Wide Name (WWN) is a unique identifier that is hard-coded into each Fibre Channel (FC) device by the device’s manufacturer. WWNs provide a method for identifying FC devices across the network. Each WWN conforms to one of several formats defined by the Institute of Electrical and Electronic Engineers (IEEE).
What is WWNN and WWPN?
A WWPN is a World Wide Port Name; a unique identifier for each Fibre Channel port presented to a Storage Area Network (SAN). Each port on a Storage Device has a unique and persistent WWPN. A World Wide Node Name, WWNN, or WWnN, is a World Wide Name assigned to a node (an endpoint, a device) in a Fibre Channel fabric.
How many characters were in WWN?
The WWN Name (maximum 64 characters) must consist of alphanumeric characters and at least one symbol. In the Available Ports list select the port connected to the WWN.
What is LUN in Linux?
In computer storage, a logical unit number, or LUN, is a number used to identify a logical unit, which is a device addressed by the SCSI protocol or by Storage Area Network protocols that encapsulate SCSI, such as Fibre Channel or iSCSI.
How do I scan a LUN ID in Linux?
Follow the process to rescan the new added FC Luns:
- Identify the existing disks. fdisk -l 2>/dev/null | egrep ‘^Disk’ | egrep -v ‘dm-|type|identifier’
- Identify the number of HBA adapters. systool -c fc_host -v.
- Use the below command to scan the LUNs.
- Verify the Detected disks from fdisk again.
How to find the WWN number in Linux?
systool will help you to find the wwn numbers. To get systool you need to install sysfsutils package. 1 members found this post helpful. Some distros may not have that.
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