Please note that performing
issue_lipis not recommended to scan the newly added devices on existing storage ports. This operation performs a Loop Initialization Protocol (LIP), scans the interconnect, and causes the SCSI layer to be updated to reflect the devices currently on the bus. Essentially, an LIP is a bus reset, and causes device addition and removal. To scan the devices without affecting the existing paths, use How to rescan the SCSI bus to add or remove a SCSI device without rebooting the computer. The methods of detecting new luns, as outlined in the aforementioned document, should be tried before attempting a LIP. A LIP will result in all in-flight IO to being lost and can result in significant error recovery actions which can adversely impact system performance.
Have 17 LUNs newly made available to the server, can see those disks from
fdisk -l. However,
multipath -lldoes not show paths to those LUNs. Following are the steps performed so far:
1. Rescan Fiber Channel by running:
# echo "1" > /sys/class/fc_host/host3/issue_lip # echo "1" > /sys/class/fc_host/host4/issue_lip
2. Reload multipath configuration:
# service multipathd reload
3. Check new devices with
- Red Hat Enterprise Linux 6
- Device Mapper Multipath(DM Multipath)
- Fibre Channel Storage
Subscriber exclusive content
A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.