Maximum allowed SCSI paths error

Nice post here from user: SteveShepherd
http://communities.vmware.com/message/2203951




Received this error while rescanning  his storage adaptors:
Error while rescanning adapter vmhba36.  Error was Unable to scan VMkernel SCSI subsystem for new devices.Sysinfo error on operation returned status : Maximum allowed SCSI paths have already been claimed.




Problem:
His count of the scsi paths was no where near 1024, which is the toal number of paths allowed.


He had 12 paths


Example of where to look in the GUI:









Answer he found:
The gui didn’t count dead paths but they are counted against him:


Used esxcfg-mpath -l   to find the list of paths from the command line
Over 1000 dead paths? that's a lot of paths.
Rebooting fixed him up.


Could have also done this:   use esxcfg-rescan -d adaptor
In this case adaptor would be vmhba32 which has the dead path


here is  esxcfg-mpath -l getting an error in a state of a path



 rescan the hba









Now if we look for any dead paths we don’t find one.







No more dead paths