Yellow Bricks

by Duncan Epping

Rescan all vmhba’s at once with the esxcfg-rescan command

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Using the console it’s very easy to rescan a specific vmhba which can be useful when you are troubleshooting. For lazy people like me it’s disturbing that you have to type the command twice if you want to rescan both HBA’s. Well, as of version 3.5 VMware introduced a new setting in Advanced configuration section in the VirtualCenter Client:

Go to “Configuration” of the ESX Host
Click on “Advanced”
Click on “Scsi”
Set “Scsi.ScsiRescanAllHbas” to 1

This can also be done from the command line:

esxcfg-advcfg -s 1 /Scsi/ScsiRescanAllHbas

Now you don’t need to type “esxcfg-rescan vmhba1” and “esxcfg-rescan vmhba2” anymore, when rescanning an HBA all cards will be rescanned.

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Comments

  1. Hello,

    This command doesn’t work :

    esxcfg-advcfg -s 1 /SCSI/ScsiRescanAllHhas

    error message :
    Exception occured: Unable to find branch SCSI

    best regards.

    Gregory.

  3. It doesn’t work :

    esxcfg-advcfg -s 1 /Scsi/ScsiRescanAllHhas

    Exception occured: Unable to find option ScsiRescanAllHhas

  7. On

    # vmware -v
    VMware ESX Server 3.5.0 build-153875

    That setting is default to one (1) and affects the rescan that you do on the GUI, not the command line. You can verify that doing a rescan on the command line and you will see an error

    —— Setting

    # esxcfg-info | grep -i -C5 rescanall
    \==+Advanced Integer Option :
    |—-Option Name…………………………….ScsiRescanAllHbas
    |—-Current Value…………………………..1
    |—-Default Value…………………………..1
    |—-Min Value………………………………0
    |—-Max Value………………………………1
    |—-Hidden…………………………………false
    |—-Parent…………………………………/Scsi/
    |—-Path…………………………………../Scsi/ScsiRescanAllHbas

    ——– Command
    # esxcfg-rescan
    Incorrect number of arguments.
    Usage: /usr/sbin/esxcfg-rescan

    # esxcfg-rescan -h
    Usage: /usr/sbin/esxcfg-rescan

    Ruben

    Note: You can use the GUI to set up advanced options.