Having an ESX cluster is nice, and adding shared LUNs can sometimes become click redundant (host, config, storage, rescan; repeat).
Since we’ve been migrating to a new storage array, we’ve been adding quite a few LUNs to different clusters on different vCenter servers, so I wanted an easy way to rescan everything.
So here’s my script:
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#set the input options here as -vc and -cluster param([string]$vc = "vc", [string]$cluster = "cluster") #check to make sure we have both if (($vc -eq "vc") -or ($cluster -eq "cluster")) { write-host `n "Rescan-Storage rescans all HBAs, then goes back and rescans VMFS for all hosts in a specific cluster" `n Write-host `n "Required parameters are vc and cluster" `n `n "Example: `"Rescan-Storage -vc drtapw0015001 -cluster drtcrl0011101`"" `n break } #connect to VC Connect-VIServer $vc #get a list of physical servers in a specific cluster $servers = get-vmhost -location $cluster |sort name #rescan all HBAs first foreach ($server in $servers) { write-host "Scan all HBAs on "$server get-VMHostStorage -VMHost $server -RescanAllHba } #go back and rescan all VMFS foreach ($server in $servers) { write-host "Rescan VMFS on "$server get-VMHostStorage -VMHost $server -RescanVmfs } #done, lets disconnect Disconnect-VIServer -confirm:$false |
So you basically run rescan-storage.ps1 -vc vcenterservername -cluster clustername
-cluster isn’t only for clusters, though, you can target a host, a vDatacenter, and perhaps a folder (I only tested cluster and vDC).