Disabling Hardware Accelerated Move (XCOPY) in ESXi
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Disabling Hardware Accelerated Move (XCOPY) in ESXi

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Article ID: 319439

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Updated On:

Products

VMware vSphere ESXi

Issue/Introduction

The VAAI feature HardwareAcceleratedMove performs the following array operations:
 
  • Clone Blocks/Full Copy/XCOPY, which is used to copy or migrate data within the same physical array

    Full copy, also called clone blocks or XCOPY, enables the storage arrays to make full copies of data within the array without having the host HBAs read and write the data. This operation reduces the time and network/SAN load when cloning virtual machines, provisioning from a template, or migrating with Storage vMotion.
     
    This article explains how to disable HardwareAcceleratedMove (XCOPY) in ESXi


    Environment

    VMware vSphere ESXi 5.1
    VMware vSphere ESXi 6.5
    VMware vSphere ESXi 6.0
    VMware vSphere ESXi 5.0
    VMware vSphere ESXi 8.0
    VMware vSphere ESXi 7.0
    VMware vSphere ESXi 5.5
    VMware vSphere ESXi 6.7

    Resolution

    • To disable Hardware Accelerated move a.k.a. use the following ESXCLI command:
       
       
      esxcli system settings advanced set --int-value 0 --option /DataMover/HardwareAcceleratedMove
       

      Note: This option is effective immediately and does not need any reboot or mount/unmount of volumes.
       

    • To disable hardware accelerated move using the vSphere Web Client, follow the below procedure :
       
      1. Browse to the host in the vSphere Web Client navigator.
      2. Click the Configure tab.
      3. Under System, click Advanced System Settings.
      4. Change the value for DataMover.HardwareAcceleratedMove to 0 (disabled):

         
      Note: This option is effective immediately and does not need any reboot or mount/unmount of volumes.
     


    Additional Information

    This is a list of commonly used SCSI opcodes related to VAAI operations:
     
    0x93
    WRITE SAME(16)
    0x41
    WRITE SAME(10)
    0x42
    UNMAP
    0x89
    SCSI COMPARE and WRITE - ATS
    0x83
    EXTENDED COPY
     
    Occasionally, failures during VAAI operations would be logged in the /var/log/vmkernel.log file as shown in this example:
     
    Cmd(0x41248092e240) 0x42, CmdSN 0x13bb23 to dev "naa.xxxxxxxx" failed H:0x0 D:0x2
    在 ESXi 中禁用 Hardware Accelerated Move (XCOPY)

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