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Example:

load pci_io_bypass DIA


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Note

In AlphaStation 400 configuration use the following syntax for PCI I/O bypass storage loading:

load pci_io_bypass DIA irq_bus = isa


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Configuration parameters

The I/O Bypass controller has the following configuration parameters:

container

Parameter

container[N]

N is 0..32766 (no more than 64 units)

TypeText string
Value

Possible values of the parameter are strings in one of the following forms:

  • Physical disk
    •  "\\.\PhysicalDrive<X>", where X is 0, 1, … 
      (warning) Be careful not to destroy all the information from the disk dedicated to CHARON VM by mistake. 
      These disks must not be formatted by the host OS. 
      Example:

      set DIA container[0]="\\.\PhysicalDrive1"

      .

  • Physical disk by its WWID 

    • "\\.\PhysicalDrive(DevID=XXX-...-XXXX)"

      (warning) Be careful not to destroy all the information from the disk dedicated to CHARON VM by mistake.

      These disks must not be formatted by the host OS.

      DevID addresses the target physical disk by its WWID (hexadecimal 128-bit identifier assigned to the disk drive by its manufacturer/originator).

      Example:


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      set DIA container[100]="\\.\PhysicalDrive(DevID=6008-05F3-0005-2950-BF8E-0B86-A0C7-0001)"


      .

  • iSCSI disks
    • "\\.\PhysicalDrive(iScsiTarget = <iSCSI target>, LUN = <LUN number>)"

      iScsiTarget addresses the disk by its iSCSI target name.

      LUN specifies LUN on connected iSCSI disk.

      Example:

    ISO file for reading distribution CD-ROM image
    • [<drive>":\"<path-name>"\"]<file-name>[".iso”]  
      Mapping may also include the full path (recommended), for example: "C:\My disks\vms_distribution.iso"  

      Example:

      set DIA container[600]="C:\My disks\vms_distribution.iso


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      set DIA container[200]="\\.\PhysicalDrive(iScsiTarget=iqn.2008-04:iscsi.charon-target-test1, LUN= 1)"

      .

    SCSI disk unknown to Windows for direct mapping

    "\\.\Scsi<N>:<X>:<Y>:<Z>" 
    The values of N, X, Y and Z can be collected using special utility "Host Device Check" included in the CHARON distributive - or manually by investigation of the devices connected to CHARON host in the "Device Manager" applet.
    ParameterDescription
    NA logical number assigned by host operating system (Microsoft Windows) to logical or host’s physical storage resource such as physical SCSI HBA
    XAn internal SCSI bus number (usually 0) on host’s physical SCSI HBA
    YA SCSI ID of physical SCSI target device attached to host’s physical SCSI HBA
    ZA logical unit number inside physical SCSI target device attached to host’s physical SCSI HBA

    Example: 

    set DIA container[202]="\\.\Scsi1:0:1:0"

    .

    • "


      .

  • File representing a physical disk of the HP Alpha system (disk image)
    • [<drive>":\"<path-name>"\"]<file-name>[".vdisk"] 
      These files can be created from scratch with "MkDisk" utility. Data and OS disks backups are transferred from the original system via tapes or network and restored into these container files.   
      Mapping may also include the full path (recommended), for example: "C:\My disks\my_boot_disk.vdisk"   
      Example: 

      set DIA container[401]="tru64-v51-system.vdisk"


      Warning

      Using compressed folders to store virtual disks and tapes is not supported

      .

  • Other type of drive, for example magneto-optical drive
    • "\\.\<N>:" 
      Example:

      set DIA container[300]="\\.\Z:"


      Warning

      Using compressed folders to store virtual disks and tapes is not supported

      .

(info) This parameter is initially not set, thus creating NO storage elements on the controller..

removable

Parameter

removable[N]

N is 0..32766 (no more than 64 units)

TypeBoolean
Value

When set to "true", the removable configuration parameter instructs CHARON VM to report the corresponding virtual disk as removable.

Note to set this parameter to "true" if this disk storage element is:

  • Mapped to a host removable device
  • Mapped to a disk image located on a host removable device
  • Mapped to a disk image that has to be renamed/moved/deleted right after dismounting it in the guest OS

By default the removable configuration parameter is set to "false".

Example:

set DIA removable[400]=true



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