multipath: one path is missed

[Beijinger]

Hi there,

After cold reset the ESX Server host( powered cycle), one path of all LUNs are missed. So far, vm is running well.

I am sure SAN storage, zoning, HBA are fine (SAN Manager software shows the two paths are ok). Can I manually add

the missed path in VI without interrupting the VM running? Thanks.

[mikepodoherty · Accepted solution]

2 options that might work:

Open VirtualCenter -highlight the host, choose Configuration, choose Storage Adapters and click rescan - (instructions based on VMware ESx 3.x - with ESX 2.5 you have to log into the server through in order to rescan the HBAs)

Log into the service console using PuTTY or another SSH client, change to the root user and run esxcfg-rescan vmhba1 and excfg-rescan vmhba2 (assuming that vmhba1 and vmhba2 are the hbas communicating with the SAN.)

Then run esxcfg-mpath -l to see if they path has been discovered.

If it hasn't then you need to troubleshoot - for example reboot the server and use the hba configuration utility to see if the server sees the SAN - for QLogic its FAST!Util - CTRL-Q during the reboot process