Page Comparison

Pass through mode only!

Establish connection between virtual DEC-KGPSA-CA PCI FC adapter and physical EMULEX LightPulse PCI/PCI-X/PCIe FC adapter (pass through mode)

Syntax:

Example:

wwid[N]

N is 0..32766 (no more than 255 units)

Sets WWID for emulated KGPSA adapter unit.

Syntax:

Example:

container[N]

N is 0..32766 (no more than 255 units)

Text String

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

• Physical disk

• • "/dev/sd<L>", where "

• • L" is letter
  • "/dev/disk/by-id/..." - addressing by the disk ID, for example "/dev/disk/by-id/ata-ST1000DM003-9YN162_S1D01QJ4"
  • "/dev/disk/by-label/..." - addressing by the disk label, for example "/dev/disk/by-label/MyStorage"

  • "/dev/disk/by-uuid/..." - addressing by the disk UUID, for example "/dev/disk/by-uuid/0e808a2f-cdd3-4944-a245-f729ffd73882"
     Be careful not to destroy all the information from the disk dedicated to CHARON-AXP by mistake.

    Note
    Since "/dev/sd<L>" addressing is not persistent, so it is strongly recommended to use "/dev/disk/by-id/wwn-*" syntax instead to refer the disk by its WWID - especially in the enviroments utilizing FC and SAN storages.

    These disks must not be formatted by the host OS.

    Example:
    

    set FGA container[0]="/dev/sdb"

    It is also possible to use not a whole disk, but previously created partitions on it. In this case the syntax is the following: "/dev/sd<L><N>" where N is the number of partition to be used.

    Example:

    set FGA container[0]="/dev/sdc3"

    .

• Multipath disk
  • "/dev/dm-<N>"
  • "/dev/mapper/mpath<N>"
  • "/dev/mapper/disk<N>"
    

• •  Be careful not to destroy all the information from the disk dedicated to CHARON-AXP by mistake.  

    These disks must not be formatted by the host OS.

    Example:

    set FGA container[200]="/dev/dm-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 "mkdskcmd" utility. Data and OS disk 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: "/my_disks/my_boot_disk.vdisk"

• • Example:

    set FGA container[401]="my_dka401.vdisk"

    .

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

media_type[N]

N is 0..32766 (no more than 255 units)

Text String

Instructs CHARON-AXP to use the supplied value as the PRODUCT field in the FC INQUIRY data returned to a software running on virtual HP Alpha system in response to FC INQUIRY command.

If not specified, CHARON-AXP attempts to guess the FC INQUIRY data based on virtual FC device type and underlying container (which is specified in the corresponding container configuration parameter).

Initially is not specified.

Example:

removable[N]

N is 0..32766 (no more than 255 units)

When set to "true", the removable configuration parameter instructs CHARON-AXP to report the corresponding virtual FC device as removable.

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

Example:

geometry[N]

N is 0..32766 (no more than 255 units)

Text String

This formatted string value specifies the explicit geometry of the disk storage element.

The string format is <X>”/”<Y>[“/”<Z>]

 or <X>”,”<Y>[“,”<Z>][“,”<B>] where:

If this parameter is not set, CHARON-AXP will configure the geometry based on the most probable disk type.

Initially not set.

Example:

use_io_file_buffering[N]

N is 0..32766 (no more than 255 units)

Boolean

When set to "true", instructs CHARON-AXP to enable host operating system I/O cache on reading/writing operations.

Note that this caching has a significant effect only in case of mapping to disk containers, not physcial drives. 

When enabled, host operating system I/O cache may significantly improve I/O performance of the virtual system. At the same time maintaining I/O cache requires additional host resources (CPU and memory) which may negatively affect overall performance of the virtual system.

Initially is set to "false".

Example: