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SteveShepherd
Contributor
Contributor

Maximum allowed SCSI paths error

Hi,

I'm trying to add a datastore to an ESXi5 host.  The host access to the iSCSI storage seems to be ok but when I rescan the storage adapters I get an error I haven't seen before.

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.

I only have 6 devices with 12 paths so I'm not sure what is going on here.  Can anyone help?

Thanks,

Steve

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BrownUK
Contributor
Contributor

So when you list the paths how many are displayed ??

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sparrowangelste
Virtuoso
Virtuoso

under Hosts and clusters-> host-> configuratiuon-> storage adpators

If you click an adaptor it should show you target /devices/paths in details.

whats is it saying there?

--------------------- Sparrowangelstechnology : Vmware lover http://sparrowangelstechnology.blogspot.com
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SteveShepherd
Contributor
Contributor

I figured it out.  The GUI was lieing to me - i didn't show any dead paths.  But when I logged into the host and ran an esxcfg-mpath -l there were over 1000 dead paths.  I tried to delete them but that didn't work so I rebooted the host.  That sorted things out and I can add the storage ok now.

Thanks for the help.

Steve

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sparrowangelste
Virtuoso
Virtuoso

thanks for updating.

in the future if this occurs you might be able to do that without rebooting

try esxcfg-rescan -d  adaptor where adaptor is your adaptor you are targeting, in your case vmhba36

that scans for dead paths.

http://sparrowangelstechnology.blogspot.com/2013/03/maximum-allowed-scsi-paths-error.html

--------------------- Sparrowangelstechnology : Vmware lover http://sparrowangelstechnology.blogspot.com